There is a HB I have been hooking up with for a few months, great sex and chemistry.
So the other night she came to my place (she offered) for our regular hook up. As usual within a few minutes we were rolling in the sack, unplanned but it always happens we are both used to it.

After a great session I made her some dinner and noticed she is getting very distant and cold. After dinner I throw on a movie and at this point she is facing away and staring into space. I ask what is wrong and she just says "I don't know". She rejects my attempts to comfort her so I back off but after an hour of this I ask her what she wants and she says "I don't know what I want".

Tired of BS I tell her she doesn't have to stay if she isn't happy and I am going to sleep.
She walks out I make no attempt to stop her.

I am folding with her I think it's time to call it quits I won't put up with this kind of behaviour from any woman ever again.

I realize I began to treat her too nice which she probably perceived as neediness but I like to treat my girls well. I know she loves our hookups, I suspect I was getting too personal with her when she was only in it for the sex..

I wonder what I could have done differently to keep her around?

Sounds like you don't care anyway. Move on I guess.

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USER HAS BEEN BANNED FOR REPEATEDLY IGNORING MOD WARNINGS AND MULTIPLE RULE VIOLATIONS

Sounds like you started treating her as a gf. IDK if you did anything else or treated her like that previously, but if I had to hazard to a guess, I would say that she felt like you were bringing her into the girlfriend zone, and she was unsure if she wanted that or not. Sounds like you maybe don't want it either, but I would have at least brought it up, because we all know she won't, even if she's thinking about it.

My advice would be to just next her and assume she won;t reach out to you, but if she does, take a step back and just hook up with her as usual. If you are in fact interested in an ltr with her, bring it up. If she brings it up first, just be honest and tell her exactly how you feel about her, not some bs that you think will get her in your bed faster.