Why Can’t I Stop Thinking About Someone I Barely Know?

You may have had only a handful of conversations.

Maybe one date. A few messages. A brief encounter that felt unusually easy or exciting.

You don’t know how they handle conflict. You haven’t seen them on a difficult day. You don’t know what they are like when the novelty wears off, whether their values match yours, or whether the two of you would actually work as a couple.

And yet, somehow, they keep appearing in your mind.

You replay conversations. You wonder what a message meant. You imagine seeing them again. You notice yourself thinking about possibilities that haven’t happened.

It creates a strange contradiction:

How can someone occupy so much space in your mind when they occupy so little space in your actual life?

The answer isn’t necessarily that you’ve met “the one.” But it isn’t necessarily that your feelings are meaningless, either.

Sometimes attraction, uncertainty, imagination, and our need for connection begin interacting long before we have enough real experience with someone to know what the relationship actually is.

Understanding that difference can tell you something important—not only about the person you’re thinking about, but about what is happening inside you.

You May Be Thinking About More Than the Person

When you know someone deeply, your feelings have a large amount of reality to work with.

You know their strengths and their irritating habits. You’ve seen how they treat other people. You’ve disagreed. You’ve repaired misunderstandings. You’ve watched their words either match their actions or fail to.

But when you barely know someone, much of that information simply doesn’t exist yet.

And empty space is interesting.

A warm conversation becomes something you replay.

A delayed reply becomes something you interpret.

A shared look becomes something you wonder about.

A promising first date becomes the beginning of a relationship that exists, for now, mostly in possibility.

Gradually, two versions of the person can begin to coexist:

the person you actually know, and the person your mind is still constructing.

The second isn’t necessarily a fantasy in the dramatic sense. It may simply contain assumptions that haven’t yet been tested.

You know they were attentive during dinner.

You don’t yet know whether they are consistently attentive in relationships.

You know there was chemistry.

You don’t yet know whether there is compatibility.

You know how you felt around them for two hours.

You don’t yet know how the two of you function together over time.

That distinction matters because the intensity of a feeling can grow faster than your actual knowledge of the person.

Uncertainty Gives Your Mind Something to Solve

There is another ingredient that can make an early connection unusually difficult to put down:

not knowing.

Do they like me?

Will they message again?

Did that moment mean as much to them as it did to me?

Why were they so warm yesterday and distant today?

Will I see them again?

These questions don’t provide the mind with a clean ending. They leave something unresolved.

An interesting experiment published in Psychological Science illustrates how uncertainty can influence romantic thinking.

Researchers Erin Whitchurch, Timothy Wilson, and Daniel Gilbert showed college women Facebook profiles of men and gave them different information about how much those men supposedly liked them.

Some participants were told the men liked them a lot. Others were told the men liked them an average amount. A third group was left uncertain about whether the men liked them a lot or only an average amount.

The women in the uncertain condition reported thinking about the men the most. In this particular experiment, they also reported the greatest attraction toward them.

That doesn’t mean playing hard to get is a universal recipe for attraction, nor does one experiment explain every intense crush.

But it illustrates something useful:

uncertainty can keep a person mentally active.

Sometimes you aren’t thinking only about the person.

You’re thinking about the unanswered question they represent.

When Does This Become Limerence?

If you’ve searched online for reasons you can’t stop thinking about someone, you’ve probably encountered the word limerence.

Psychologist Dorothy Tennov introduced the term after studying experiences of intense romantic preoccupation.

Her descriptions include experiences such as romantic daydreaming, fear of rejection, jealousy and insecurity, as well as intense feelings for people who did not reciprocate—or sometimes didn’t even know about—the person’s feelings.

Modern researchers are continuing to investigate the phenomenon.

A 2026 study published in Acta Psychologica examined what the researchers called impairing limerence—a particularly intrusive and disruptive form of romantic preoccupation. In an experience-sampling portion of the research, limerent thoughts occupied roughly half of participants’ waking thoughts, with sadness and loneliness among the mood states associated with those thoughts.

But there is an important distinction here.

Thinking about someone frequently does not automatically mean you are experiencing limerence.

And having a strong crush doesn’t automatically mean something is psychologically wrong.

The 2026 research examined people experiencing an impairing form of the phenomenon. Its findings shouldn’t be turned into a diagnosis for everyone who can’t get a new romantic interest out of their head.

Sometimes you’re simply attracted to someone.

Sometimes you’re excited.

Sometimes you’re uncertain.

Sometimes the experience may indeed become much more intrusive.

The important question isn’t merely how often you think about the person, but what those thoughts are doing to your life and how much reality they contain.

Could Attachment Be Part of What You’re Feeling?

Attachment offers another piece of the puzzle, but this one also needs to be handled carefully.

In their extensive work on adult attachment, researchers Mario Mikulincer and Phillip Shaver describe how activation of the attachment system can increase the mental accessibility of attachment-related representations: a person’s appearance, comforting words, memories of interactions, thoughts about closeness, love and support. Some of these processes can begin outside conscious awareness.

They also describe hyperactivating attachment strategies, which can involve heightened vigilance toward possible threats, exaggerated threat appraisal, and rumination about previous or even possible threatening experiences—processes that can intensify efforts to obtain attention, care or reassurance from another person.

That doesn’t mean:

“I keep thinking about them, therefore I have anxious attachment.”

Human relationships are not that simple.

Attachment is better understood as one possible layer of the experience.

If uncertainty about someone’s availability makes you intensely preoccupied with signs of closeness or rejection, it may be useful to explore whether the connection is touching a deeper need for reassurance or security.

If that sounds familiar, we’ve explored this distinction more fully in Soulmate or Attachment? How to Tell What You’re Really Feeling.

Feeling Attached Isn’t the Same as Knowing Someone Deeply

This may be the most important distinction of all.

You can feel strongly about someone before you know very much about them.

That doesn’t make the feeling fake.

But it does mean that emotional intensity and relational knowledge are not the same thing.

Mikulincer and Shaver describe romantic bonds as developing over time. Early romantic involvement can begin in a preattachment phase, progress toward attachment-in-the-making, and eventually develop into a clearer attachment bond.

In other words, feeling pulled toward someone very early doesn’t necessarily tell you what kind of relationship you actually have.

You may know that talking to them feels effortless.

You don’t yet know how they communicate when they’re angry.

You may know they make you feel desired.

You don’t yet know whether they make you feel emotionally safe.

You may know you have extraordinary chemistry.

You don’t yet know whether your values, expectations and lives are compatible.

Those answers require something imagination cannot provide:

experience.

Ask Yourself: What Do I Actually Know?

If someone is taking up an enormous amount of mental space, you don’t necessarily need to force yourself to stop thinking about them.

Instead, try separating three things.

What I Know

These are meanings you’ve assigned to what happened.

“They took six hours to reply, so they’re losing interest.”

“They looked at me that way, so there must be something special between us.”

“They told me something personal, so they must trust me more than other people.”

An interpretation may eventually prove correct.

But it isn’t the same thing as a fact.

What I Imagine

This is where possibility lives.

What would dating them be like?

Where could the relationship go?

What kind of partner would they be?

Could this finally be the connection you’ve been waiting for?

Imagination isn’t inherently bad. It’s part of anticipation, attraction and hope.

The problem begins when what you imagine becomes more influential than what the person has actually shown you.

Try asking yourself:

How much of what I’m feeling comes from what has happened—and how much comes from what could happen?

That question can reveal a surprising amount.

What Happens When Imagination Meets Reality?

There is no need to dismiss an intense early connection simply because some of it contains uncertainty or imagination.

Sometimes reality eventually confirms the feeling.

You spend more time together.

The conversations deepen.

Interest becomes mutual and consistent.

You discover shared values.

The person you imagined and the person you gradually come to know begin to resemble each other.

That’s how possibility can become relationship.

But sometimes the opposite happens.

More information arrives, and the image changes.

You discover that the chemistry is stronger than the compatibility.

Their availability is inconsistent.

Your values differ.

The emotional depth you imagined isn’t actually there.

Or perhaps the connection becomes less intoxicating once the uncertainty disappears.

Neither outcome means your original feelings were fraudulent.

It simply means feelings are information, not verdicts.

Intensity can tell you that something matters to you. It cannot, by itself, tell you what the relationship will become.

You Don’t Have to Stop Feeling to Start Seeing Clearly

Maybe you can’t stop thinking about this person because something genuine is beginning.

Maybe uncertainty is keeping an unanswered question alive.

Maybe your imagination has spent more time with them than you have.

Maybe the connection has touched a deeper longing for closeness, reassurance, possibility, or love.

Several of those things can even be true at the same time.

You don’t have to dismiss the feeling.

But you also don’t have to treat its intensity as proof that you’ve found the right person.

Give reality enough time to participate.

Notice what they consistently show you.

Notice how you feel not only when you’re waiting for their attention, but when you actually receive it.

And when your mind returns to them for the hundredth time, perhaps the most revealing question isn’t:

“Why can’t I stop thinking about them?”

It may be:

“What part of this connection exists between us—and what part currently exists inside me?”

Sources & Further Reading

• Dorothy Tennov — Love and Limerence: The Experience of Being in Love
• Mario Mikulincer & Phillip R. Shaver — Attachment in Adulthood: Structure, Dynamics, and Change
• Whitchurch, E. R., Wilson, T. D., & Gilbert, D. T. — “He Loves Me, He Loves Me Not…”: Uncertainty Can Increase Romantic Attraction, Psychological Science.
• Evans, C., Panton, S. O., Strawson, W. H., Floyd, E., Kellett, S., & Poerio, G. L. — Love, longing and obsession: Features, correlates, comorbidities, and real-time cognitive-affective dynamics of limerence, Acta Psychologica, 2026.