There was a girl that I met at a swing dance bar. When I met her we had a dance, during the dance she definitely felt pretty interested in me (great conversations, bring up conversations with me, didn’t leave after our first dance, so in our second dance, I was a bit more directly flirting, then after that she started talking less. At the end I told her that I would like to get to know her more, and asked for her number, she said she can give me her instagram, so I got that.

note: she didn’t follow me back.

But recently I just found out she has a boyfriend, and she very possibly was either already dating him or talking to him at that time.

So why did she not tell me she had a boyfriend?