Relationship problems I need advice ?

Now Ive been with my boyfriend for over a year now and we had some ups and downs but i found out march 17th he told me that he cheated on me and made out with some girl.... on march 13th on his birthday i went out to a party with him for his birthday and it was with all of his friends and some girls where there and he cheated on me with this girl names emily and she was there that night and i had no idea that they even made out long story short I was very upset but i love this guy and actually see myself marrying him but then he starts getting angry at me and saying well you hung out with a coworker at his apartment for 5 hours with two other guys there but the story was that was true but i was texting him thw whooooooole time i was there. The other thing he gets mad at me about is that I had sex with this guy before i dated matt and He called me a month ago and i was going to my friends party that night i invited him to hook up with one of my girlfriends aparently matt found out that he was there and said i lied to him and he got so upset with me and he said if he knew that i invited him he would of broke up with me its just i feel like he always has to know what im doing all the time BUT he can go out to parties and im not aloud cause there might be guys there and he doesnt want me around ANY guys or talk or look or anything He looks through my phone and my facebook and gets mad at me for not wanting sex with him its just he complains about so much stuff ive done wrong in the relationship I just dont know what to do anymore ???? any advice would be helpful :)