I don't know what to do, it all seems so unreal

I have been with this guy for about 2 and half years. He and I at first were a match made in heaven due to the fact that he and I liked all of the same things, we met when we were about 20, and we hit it off instantly. Of course he was with someone and I was with someone of about 2 years, and same goes for him, we decided that since we both made each other happy that we wouldn't pass up the opportunity to be happy with one another. Of course he is very attractive, some might say he is "ok" but to me is the sexiest guy ever, now for about 4 months everything was fine. He took me camping, dirt biking, we went to nice places to eat. He rode me around on his motorcycle etc. I was living the most exiting dream ever, I really felt like I was the luckiest girl in the world. After about 4 months things started to get a little hectic, he would mention his ex a lot, he would call me names like "stupid. idiot, dumb ass" Of course at first I was like "Oh, well he is just kidding and it's ok" so I let it go for a while. After about 6 months of dating he asked to move out from our friends house and back into his parents now of course I didn't really get a long with his parents nor did he with mine, but since we were both young and at the time I didn't really care that my family disapproved of him (he talked shit to my mother and put her down, she is a very sweet person and it was over something so ridiculous) and I thought that since I was "happy" that it didn't matter what everyone else thought. I agreed to move in and of course shit was horrible. His parents wanted me to clean everything on a certain schedule, they never looked for work all they did was play Pogo online and didn't get jobs. When I felt like I was being treated un fairly I would go to him and tell him how I felt and he would tell me "that's just how my dad is, you have to get over it" and of course it hurt, because here I am living in a house with people who fight all the time. Now over time I just learned to ignore them, and the bf over time started to only care about the stuff he wanted in life. He would more and more tell me that I'm worthless, I'm fat..I will never find anyone better than him. Sometimes he would even put his hands on me. But I just kept telling myself that, there's no way that he is THIS bad, there is no way that he can't change because I can change him, I have that power. So I stayed, and I let him do whatever he wanted to me and say whatever he wanted. I couldn't go and see my family without him saying "you have to be back at this time, or I'm going to be pissed" and I would make up some bullshit story to my mom saying that "oh we had dinner reservations and I gotta be home early" and she would believe me and I would feel like shit for lying. I won't make myself sound like a saint, there was about 45% of the time that he was moderately nice, and would do nice things for me. Of course it was all short lived and he would go back to being angry or upset. He wanted me to rub him every night (massage) and tickle him in a certain way. If I did it wrong, or didn't do it right/long enough he would say "I hate my life, I wanna die, You are worthless, leave me alone" and he would go back to sleep and I would lay there crying for a long long time. In about June of 2011 him and I ended it because he put his hands on me for the last time and I couldn't deal with it anymore, so I moved back in with my mom but ultimately missed him and he missed me. We tried and worked things out, and everything was OK for about 4 months. Then he got too comfortable with me again and we went back to the vicious cycle. He wanted me to drop a whole bunch of weight, because "I won't take you to Santa Cruz unless you look skinny" so basically he was embarrassed to be around me. All I ever did was everything he wanted to do/asked me to do. I was willing to do EVERYTHING for him to make him happy and see that it is OK to love and it's OK to take one day at a time because he was always thinking about his future, boats, cars, dirt bikes, trips. Granted it's normal but there is a limit, if you can barely afford the stuff you have don't go out and get more, ya know? Anyway, so I have lived with my parents since then and just recently about a month ago we came back from a nice trip to a hot spring and things were OK, of course we fought a little but I was so use to it. When we came back to his parents house, I took a quick shower, now they really don't like me and think I'm just a leech but it was a 5 minute thing, I come out they are all fighting, the mom says "get out, leave and move". So of course we go on an adventure of finding our own place and I just get this uneasy feeling of "I'm not ready" and so he finds a place, we are about to move in and we get into a huge fight about the bills and what not and I end it. Of course for a little bit he was like "Ok fine whatever" and left but not soon long after he came back to me and was saying he was sorry and that he wanted to change" At this point I was so over him that I didn't want anything to do with him and I made that clear. Since he realized that I was really ending it he told me that since I have grown a back bone that he is more in love with me than ever and that he is going to change. Now I won't lie, I stuck around for a little bit, for the first week after this when he moved into his new place I really wanted nothing to do with him and I told him a week later after thinking it out and I couldn't get over who he use to be. Because to me, NO ONE can change like that unless they are desperate because they can't find anyone else in an instant. Of course every time I would tell him I don't want you anymore, he would say "OK" but then come back the same day and say he was sorry for everything and he wants to be happy because I taught him to be happy. Almost everyday of my life, we fought and fought over the dumbest shit. Over the video games we played, over the movies we wanted to watch, not listening to each other, expecting so much out of me that it made me depressed and to the point that I didn't wanna live anymore. The list goes on. So many people at first told me that he was a hand full and that he was very aggressive and very particular of who he was and what he wanted in life. It was almost scary to know and see that someone like that could actually exist in the world. He pushed everyone out of his life because he is one of those guys who think "being an asshole, gets me friends and bitches" of course being 23 you look like a dumb ass doing it. He is one of THOSE guys. Anyway now that he lives alone, he wants me back and has been fighting for me to come back for the past month now. I got a little bit soft and I still do sort of talk to him and he tells me things I wanna hear, but lately he went from being "super nice, everything I have ever wanted" to " well I am getting to the point where I can't wait for you to stay with me or go, so If I meet someone while I'm wating for you don't get mad if I am hanging out with another female." of course this pissed me off because here I am trying to say "Hey, this isn't you you are going to go right back to horrible mean self in about 4 months. Of course he disagrees and says that he is changed now because he wants to give me the world. A little part of me believes that, but a bigger part of me says he is not worth it because someone who wants to change so quickly knows that what he thought he had is leaving his life and he knows he will not be as happy as he was with me with the next girl that comes along. It's sad really, because he has the potential to be the best guy ever that any girl would want. but he is just a big asshole and he can't help that because that's how he was raised. The reason I write all this is because I want to know if I made the right choice in leaving someone and not giving them the "finally chance to prove themselves" by living with them and seeing how it goes. Now side note, if I did go and live with him, I wouldn't have anywhere to go if we didn't work because my family, friends everyone said that if I go back to him after how he has treated me then they want nothing to do with me. I need help on how to get over this, and I need to know if I will find that special someone who can offer me "adventure, camping outdoors" lifestyle that I want or If I ultimately am screwing myself over by letting this opportunity go. I just need guidance, I need to know that it's och and that I will find my special someone someday and I need help getting over the idea that he will eventually end up with someone else. I can give more info, just message me.