I am just getting out of a situation where I was " the other woman " . My question to you is if you were in a relationship with someone and they were cheating on you, would you be appreciative or at the very least want to know about it from the person they were cheating with?? The thing is, " my guy" wasn't too careful about keeping details of his girlfriend secret. I won't go into all of the details I know about her, but lets just say I could talk to her very easily. Part of me wants to say okay this happened, oh well, move on and let it go. However, the other half of me ( which is also being influenced by friends ) wants her to know... I begged him to come clean with her multiple times, he said he would and he hasn't. I don't want to tell her to hurt her or rub it in her face, I want to tell so that he is no longer able to play her because I know she does a lot for him, and she is probably a really nice girl and doesn't deserve to be treated the way he is treating her. Also, I want him to feel some of the hurt and embarrassment he has caused me to feel. I feel like I have a responsibility to tell her... BUT I don't want it to turn into a situation where she thinks I am just some crazy girl who is jealous and thinks I am lying.