me ex+me= naughty action HELP!

ok. well I broke it off with my ex. it was all great at first but after 7 months things just went down hill. he blamed me for his problems, I wasn’t there for him like I shouls have been. we were fighting constantly, we both cheated on the other with the other best friend. basically it was doomed to fail from the get go. he was a man wh0re, and I didn’t want the commitment of a serious relationship. well we got over a HUGE fight and decided to be friends. so we were hanging out and at first it all was going great, but then the friends left and I went over to his house that night. things got WAY out of hand. I let him kiss me but he ended up forcing himself on me and it was just agh, just really bad. well after 20 minutes he let me go home and I was upset and text him telling him was a jerk he was. (in not so nice words.) now he says he wants me back, even though he just got a new girlfriend a little bit ago. and part of me wants him again too. but I dont want to date him, and I dont want him to cheat on his girlfriend because I know her and shes a good person. so now what? we both want to be friends but we dont have the control to do it. any suggestions!!