@ippn1,
ippn
Not all girls like games. And, I think the dates you went on were great and what you did was great. She was attracted to you, kissed you, became more attracted to you, wanted you, waited for you to lead but that didn't happen which made her more keen.
But........................ the only thing that went wrong is there is an ex. Simply put. Yes, I believe when women sleep with a man, there is an instant type of bond, emotionally. Doesn't seem to be the same with most men but I think she is kidding herself that if she had slept with you, she would have become emotionally attached and forgotten her boyfriend. Because, if that was the case, she would have tried to sleep with you. She didn't "try" because she wanted to save herself still for her ex-boyfriend emotionally.
The guy she is sleeping with, she "thought" no one would find out about, it's just sex but her friend has a big mouth and has told you, probably a few others so it's sure to get back to her ex. She is just getting sex, nothing more, no emotions.
Always be yourself . Apparently, girls like bad guys that give them a hard time, don't call, make them wonder if they like them.. But, eventually, they get sick of being used. That is what your friends are telling you to do, be that way, end up in bed if it doesn't work out bad luck you got laid...
Is that fair one the woman?
Especially, the one that really likes you but you decide you don't like her ?
Just be yourself.... and anyone you choose to hang out with and get to know, just be sure there is no ex.. No baggage. They are ready to move on...