Advice needed... Unhealthy realationship.. Help! Please!

So me and this guy have been together for 9 months. 32308. And he cheated on me.. Ifound a bloody condom in his room in september..we broke up.. And we started talkin a few days later… I told him maybe sumday we cud move past this..(I gave him hope in a future together) then I went and had sex with this guy I knew just to get back at him…(im no slut .. I just did this because I didnt know how to feel better .. When the one you really love screws you over and lies to you like that its hard) I told him about it the next day.. He was upset…he cried and still basically wanted to be wit me…he begged..he started making changes and when we were kinda back together we got into an argument and he started talking to sum girl named “trick” I know this because I looked in his phone about a month after we got back together/started talking again and he sent this female a picture of his dick. I threw his phone to the ground (this happend in the mall) and left. (I know you all are going to think im retarted) but we got back together again.. He begged again an what not.. Apologized begged for one more chance said he wud prove to me that he loves me..and when a guy you cnt see cryin crys.. Its kinda a big deal. . So neways its 4 months later we have been together arguin a lot I guess..broke up over sum pety stuff a few times only lasted about an hour..but he hasnt f’ed it up… Hes been pretty good..but a few days ago he was sayin sum bs about maybe not bein able to see eachother on a day that we had plans and that he wasnt gona tell me yes anymore to confirm plans and its always going to be a maybe so we got off the phone and he called me when he got home from work…and it was 1 am and I told him I was in the car with my 2 friends going to a dinner to eat ..,. He got sooo mad…(I guess he didnt believe me) and he hung up the phone on me and txted me sayin you better be home at 143 or thts my word. So I sent him a video message of us at the dinner and said I love you stop over reacting im eating. And then the whole next day he ignored me till late at nite we barly talked. And argued and hung up..the next night he ignored me all day and called me late night and we argued sum more and I broke up with him ..I only did this because he had the nerve to get mad and stay mad for 2 whole days because I went to a diner and just ignore me thts not right. . . So the next day after that which was yeasterday I sent him a video message sayin if you don’t call me before the end of 2nigth thts it wit us our relationship is over. So he called but I left my phone at home all last night because I went to my friends house. So today when I got home and looked at my phone I had 3 missed calls from him last night and a txt sayin “well I called” and then a txt today sayin “take those pix of us off your myspace” and a video of him recordin a comment I sent to my x boyfriend picture sayin sexi ..and he wrote in the video message tisk tisk not a good look” so I called him he didnt pic up so I txted him sayin leave me the eff alone ..we are done…don’t txt me it will just get delted I wont even read it.” so he txted back but I deleted it… And I told him you lost sumthin good. And he hasnt said nething since… I know all of you read this like wow they are real matture… Or wow that relationship shud have been ended a long time ago..I just want someone to understand and help me… I want to move on … Im just scared… I really think/thoght that we loved eachother ..maybe not.. I don’t even know… I know love isnt like this tho… How do I move on?!?! How do I leave him alone?

Advice needed.