Relationship problem..HELP?

My bf & I have been goin out for a year & 4 months.. I loved him so much but he cheated on me an was just playin me.. After i found out he changed an now i knoe he really loves me he's done alot he even changed his cell phone num.. Ok so he cheated on me over a year ago but it still makes me so mad when i think about it. past 3 months he has started to get controllin, he doesnt want me to talk to any guy becuz he thinks he is goin to lose me .. my emails even get sent to his fone.. i now feel like i dont love him anymore & when i try to break up with him he actually beg for me not to.. & when i try makin it final i feel as if a part of me has been ripped off.. what should i do? i used to be crazy for him tryin to please him in every little thing but now its like whatever. please help!! :(.