He Has a Girlfriend but Flirts With Me: What It Means

At the office happy hour he told you your laugh was "dangerous," then added, "Don't tell Maya I said that." Now it's 11:48 p.m., and he's sending you a meme about the coworker whose playlist you both can't stand.

If you've been typing "he has a girlfriend but flirts with me" into a search bar at midnight, here's the plain reading: he wants attention from outside his relationship without making a decision about the relationship. It isn't a sign he's about to leave her for you. It's a reason to stop.

Nobody needs to be cast as the villain. It's normal to feel a little thrill when someone you like singles you out, and you don't need to beat yourself up for laughing at a few of his texts. What helps is seeing the pattern clearly. This plays out the same way with a woman who has a boyfriend, or any other combination, so from here we'll say "they" for the person flirting and "their partner" for the person they're with.

What flirting from someone taken usually looks like

Almost nobody says "I'm with someone, but I'd like to flirt with you." It tends to look more like this:

• A compliment, then a joke about their partner: "She'd kill me if she heard me say that."
• Messages that arrive late at night, or when their partner is traveling or working late. Weekends, they go dark.
• "Things haven't been good with us for a while." "We're basically over." They're still together.
• "Keep this between us." "Maybe delete that."
• At work events, they always end up next to you, and the after-party invite is just for you.
• They vent to you about their partner a lot, so you become the one who "really gets them."

One or two of these could be plain friendliness, or someone who's naturally charming. Secrecy is what changes the picture. A quick test: would they say or do this in front of their partner? If not, it isn't a regular friendship anymore.

Why would a guy with a girlfriend flirt with me?

A few common reasons, none of which you need to diagnose:

• The ego boost. Things at home have gone flat, and being admired by someone new feels good. Flirting with you confirms they've still got it.
• A backup plan. They're unsure about their relationship and want to know there's somewhere to land before they leave, if they leave. In that setup, you're the safety net.
• Unhappy, but avoiding the breakup. Ending things means hard conversations and logistics. Flirting with you lets them put that off.
• A habit. They flirt with lots of people. You happen to be one.

We don't recommend spending much energy on which one it is. Whatever the reason, what they're working through is their relationship, not you. And whatever spot you get in it is temporary, hidden and deniable.

Psychologists have a name for trying to attract someone who's already partnered: mate poaching. Research on relationships that start this way has found that, on average, they come with lower commitment and satisfaction, and the people in them keep more of an eye on other options. That's an average, not a prophecy. But it backs up something intuitive: how someone enters a relationship tells you something about how they'll handle commitment once they're in it.

Four things people tell themselves

"They'll leave their partner for me." Maybe. It rarely happens in the order you'd hope. People who are really ending a relationship usually end it, then start something new. If they keep saying "it's almost over" and it never is, "almost" can last a long time.

"We're just talking. Nothing's happened." The line isn't physical. It's secrecy. If the conversation has to be deleted or kept from their partner, it has already crossed a line for that relationship.

"They said it's an open relationship." In a real open relationship, the partner knows and agrees, and you usually aren't asked to keep quiet. You can ask directly: "Does your partner know we talk like this?" If the answer is vague, or comes with "just don't mention it," it isn't open. It's hidden.

"They're the one in a relationship, not me." True, their relationship isn't your job. Whether you take part in this is, though.

Why stepping back is the move: what it costs all three of you

Their partner is making decisions about the relationship, like whether to stay, move in or get engaged, without knowing what's going on. This is the part we care about most. Keeping the flirtation going means keeping someone out of information that directly shapes their life.

You get a hidden role. You're there when it's convenient for them. You don't meet their friends. Holidays and weekends belong to someone else. The longer it runs, the harder it is to walk away, because now you've "waited this long." And there's no unseeing what you've learned about how they treat a commitment.

Them, because the flirtation lets them avoid deciding. Whatever's wrong in their relationship doesn't get dealt with. It just gets routed through you.

Not one of the three people here is choosing with full information and on equal footing. That's why we don't teach anything about getting into someone else's relationship. Our lesson on hiding a marriage or partner explains the reasoning behind that line.

How to step away cleanly

1. Say it once, briefly, without a lecture. "You're with someone, and this kind of back-and-forth doesn't sit right with me. Let's keep it to friends." (Or coworkers.) You don't need them to agree, and you don't owe a long explanation.
2. Change the format. Stop answering late-night messages, don't play along with the flirty jokes and keep hangouts in groups. You don't have to be cold. You're just moving things back into the open.
3. Skip "let's talk when you're single." It sounds reasonable, but it tells them the gray zone is still open. If they really do become single and come back after some time has passed, that's a new conversation you can have then.
4. If it's a coworker, stay professional. Work stays work, and the personal part closes. If you've been clear and they keep pushing, that's no longer flirting. It's harassment. Keep notes and use your company's reporting channels.

They might be hurt, say you're overreacting or claim it was never anything. All fine. You don't need their agreement to stop.

For more on keeping lines clear at work, our guide on how to ask out a coworker also covers when not to. If you keep ending up in connections nobody will define, our guide to the situationship may help.

If you only found out later

Sometimes you didn't know. A month of texting, a few dates, then a mutual friend mentions their girlfriend, or you scroll into an anniversary post on Instagram. Sometimes there's a ring involved.

That's not on you. When someone hides their relationship status, you were making choices based on false information.

Looking back, the signs often only line up afterward: they were reachable at certain hours only, weekends and holidays were always "complicated," you never met their friends, their social media was oddly empty and they were vague about where they live. Our lesson on hidden marriages and juggling covers how to spot these earlier.

Once you know, it's the same as above: say it once, and stop. You don't need to hear them out before you go. "I was going to tell you" and "we've been over for ages" are things you can listen to without changing your decision.

More on reading interest and intentions lives on our signals topic page.

FAQ

He has a girlfriend but he's really nice to me. Does he like me?

He might. But whether he likes you matters less than what he's doing with it. Someone in a committed relationship choosing to flirt with you, instead of dealing with that relationship first, is the information you need. To sort plain friendliness from flirting, see is he being nice or flirting?

Should I wait if they say they're about to break up?

That's your call, but we wouldn't keep flirting during the "about to" stage. If they actually break up, give it some time, then see whether you both still want to start something. Until then, keep it to friendship.

Should I tell his girlfriend?

You're not obligated to. If you know her and think you'd want to know in her place, a calm, factual message is an option. Don't do it as payback or as a way to win him. Think about your own safety and situation too, and if you're unsure, talk it through with someone you trust first.

What if I'm the one in a relationship and I'm flirting with someone?

Having feelings for someone else happens, and feelings alone aren't wrongdoing. The honest move is to not start the flirtation and to get clear about your current relationship. If you want out, end it properly first, then start something new.