I Need Help. Asap

i ll try to make this short. i had a guy friend, we were friends for about 8 months. i meet him on myspace, i just wanted to biker buddies thats it. but we hung out on a few times after we meet online of 2008. jan. 2009 we were ata function and he asked if we could date, he was not my type so i said no, but he was consistant about asking me if we could date. i finally told lets just be friends now and get to know eac other and that maybe we could during the summer/ridding season. Sure nough he asked again on Jun. 7 2009 the day before i went out on town. while i was away notice his attitude was different. i came home after a week later of us dating to find out that he had been dating this girl for 1yr 1/2. we still continued our relationship, he "said that wasnt with the girl anymore". but on July 20, 2009 he text me while i was at work telling that she was pregnant(1 month). i contiusluy asked him that day who does he want to be with(her or i) he said with me, but he wanted to be there for the kid and that he didnt want her family mad at him and that he wanted to be there if the wakes up at nite a crys, and he wantes to be there for the kid wen it goes to school. he was supposed to tell he was going to break it off with the girl by calling her. he never did. do on aug.9,2009 i took him to the beach with out him knowing why and talked to about the situation agian being that he never brings it up. i took him nicely that he should be with her and see how things would work out with them and that i cloudnt take anymore. well he wasnt happy about that. well doctors appt was on aug. 26 2009 and i told him i dont feel comfortable by him going being that this "not something that he wanted" and being that he still has feeling for her. he told he wouldnt go, but he did behind my back and told he gonna go reguardless of how i feel. time went on i brought it up again and said he wouldnt and so far i kow for sure he hasnt. but what i cant get over is that he cheated on me and got her pregnant while i was away and went behide my back and went to the doctors appt.. this a long story and i got more to add. but if anyone, i meany anyone reads this please help me. ive never been a situation like this and i dont kow what to do. if you like to hear more about this please, please respond back to me. please someone HELP me.