I really really want to add that you really shouldn't hate HER. She didn't do anything wrong really. All she did was hook up with a guy who she was sure liked her. I'm not saying it's right for a woman to date a guy who she knows isn't single, but, well, you've been in her place with this same man! We women need to stop hating on each other and attacking each other and remind ourselves who is REALLY at fault here.

The man.

He's the one who did the cheating, he's the one who broke your heart, and he's the one who is nothing but scum. Hate on him, not her. :)

If he was cheating on a woman when he got with you, then he'll cheat on you with another woman sooner or later. You'll never be able to trust him fully and he's not worth the ahngst you're putting yourself through. But you've figured that out. Don't give him any more chances to hurt you. The new one will figure it out soon.

Dump him and his soap opera life. Don't look back. You deserve better.

I agree with someone above. The best revenge is washing your hands of the situation. Most women have all had a jerk at some point (I had mine) it took a long time to get over it. But the truth is I am happier without him. I know that now. I was so stressed and panicked all the time worrying about what he was doing. I was a constant roller coaster of emotions. High then low then really low then high. I was a mess when I was with him. And I do have to say the best thing I did was leave him, and walk away. If they are doing this and they are over age 24 or so, they are not going to change. And dont be jealous over the girl hes with now. Hes going to CHEAT on her TOO!!! Just sit back and watch it happen... he will leave her for another chick just like he cheated on you with her. Its a pattern he will never break. So you are not missing out on anything. It will get better I promise! You will be okay! *hugs*

You dated a guy that already had a girlfriend, or finance....even worse. What did you expect? Learn from your mistakes, and don't date someone that's already in a relationship next time.