What sould I do with my relationship help please?

The begining of our relationship I was young and stupid and I was talking to other men behind my partners back. The reason why I felt he was gonna cheat on me first dum move on my part...but then in january 2007 he went to jail for 2 and half years while in jail we would break up and make up...when he came home he asked me if I slept with anyone I was honest I didnt want to lie to the man and I said yes but the truth of the matter is I didnt sleep with any of those men while we were together it was during one of our break ups I was lonely sad deppressed and yarning for comfort....when he came home in 2010 he cheated on me and slept with someone..I was devasted but we stayed together moved in togetherin november and argued almost everyday....he think I cheated again but i havent..we broke up in january 2011 he told me while we were figuring things out he would tell me if he were talking to someone well he didnt....I was very upset..in april I moved out but we got together but then he broke up with me again I just want to be with this man I really do..I have not cheated nor do I want to cheat on him..I don't know what to do any advice? Im having a hard time accepting its over because I want him