Met a nice guy, we started off as friends. Then he wanted more, I wasn't sure but he pursued me very heavily. I did like him so agreed to a relationship. He did used to talk about his ex a lot but reassured me he didn't want her back.
Anyway he dumped me the first time after we had sex. He told me he wanted his ex back. In the meantime he has taken up with someone else and lots of pictures of the two of them all over Facebook talking about late night phonecalls and that they only have eyes for each other.
I am feeling really used and angry about the whole thing, I am tempted to tell his ex. He still wants her back but he uses other women while waiting for to change her mind. Shall I tell her or leave things alone?