Kinda feeling like sh*t (really long vent)

So my BD and i dont have the greatest history, but we were getting along pretty well. I asked him to fix my car last week and he said yeah he'd do it, just to bring my car over to his house. I brought my car over later that day, and he was home alone (i never go to his house when he's alone, but i needed my car fixed). the first thing he does when i walk into his house is start grabbing my breasts, i stopped him and told him to just go fix my car. After looking at it he said we needed to go to a friends house because he didnt have the right tools. So being the idiot that i am i went back inside with him and we ended up sleeping together (stupid i know).
Well we went to our friends house and his sister calls me, and tells me hes getting married on the 30th of August! Now that made me feel awful, so i asked him and he said yeah he was, and then he spent the next few minutes trying to make what we just did ok. Him cheating on his girlfriend is nothing new, he cheated on her with me for six months while me and his girlfriend were both pregnant.
I started feeling really guilty and i emailed his girlfriend and told her everything, about that day and the other six months, and she wanted proof, so i forwarded her all the text message from him and told her what her room looked like that day (she called me a bitch so i got mad). I was just trying to clear my conscience and she procedes to call me an immature bitch, a slut, and crazy. she called me a bad parent and said i didnt know who my daughters father is. but i found out the next day she had packed up her kids and left him. so i have her and my bd cussing at me and calling me names. Even though nothing that they have called me is true i still feel awful and i cant wait to move away from here in two days.

UGH! I would have done the EXACT same thing! You did good girl and the his fiance should have thanked you. People react in different ways though and you cant control it.
The girl my ex-fiance cheated on me with contacted me and told me everything about their rendezvous. I sent him packing, kept the ring, and actually had a little fling with her myself. So there!

Im sorry you are having to deal with such a loser. I think I would have told his fiancee to. He seems like he is just a low life who cant keep it in his pants. Im sorry you and your child and this lady and her children have to go through this.I hope things get better, just remember that all the things this woman says are out of anger because the truth hurts. And of course your ex is going to give you a hard time because he got caught. Keep your head up things wont be bad forever just keep telling yourself that.

im sorry you are going through this, but i would of done the same thing too.