Guy I'm seeing thinks I'm a liar

The guy I'm seeing is always getting mad at me? We have an odd relationship, we say we love each other all the time. He says he's not ready to date (we've been in a like-dating stage for 3 years). I have fallen in love with him. But I feel like I'm always worried he will leave me and find someone else, or that he's going to hook up with other girls (he has before many times -he's a major party guy and cares a lot about his look - he never rarely brings me out with him and we only seem to hang out after he's done partying). He's not comfortable with me being with anyone else. I've had a couple guys friends that like to flirt with me but know I am not at all interested in them and that I'm with someone, but he gets worried and gets me to stop talking to them. I went through a really tough event (sexual assault) and he was the perfect man and always there for me. I was being stalked and threatened which caused me to lie to my guy (in my head I thought it was safer for him, and I felt safer with him around more often). (The guy threatened my guy, and I covered it up). I messed up big with it and he found out. Since then he seems to never trust me (a year and bit later). Things seem to be normal and then randomly he will get super angry with me thinking I'm talking to another guy (which isn't something I have done before). And he will call be a whore and liar and bitch and a number of things. He gets mad at me when I post pictures he doesn't like (but likes when other girls do (like summer bikini pics)). I get emotionally exhausted and I don't know what to do, I love this man more than I could ever imagine and I don't know how to move forward. I know this is my fault and is there any way I can earn trust back.