Can someone please give me some sound advice?

my bf and i have been dating since the past 2 and a half years. ours is a love-hate relationship to be precise. we are fighting 95% of the time and i'v tried everything to ameliorate the situation but to no avail. my problem is that i feel really very stressed,frustrated and mentally tired almost all the time.as it is i do not have a social life because my father is overtly protective which has always been extremely frustrating and i cannot do anything at all about it so i dont think about it anymore.my bf knows everything but instead of acting as my support pillar he further adds to it.i have told him since the last couple of months that for my sanity i do not wish to be with him anymore as i am done with his abuses and rebukes but he just refuses to leave me or mend his ways and plainly says that i'm selfish n mean to go away just cuz m not happy. we both love each other very much but i dont feel happy at all cuz most of the time he is hurting me and i have always made sure that he knows how i feel but he just does not let me go for he knows n says that he cannot find a better girl than me.why the hell dont u treat me rite den mister?anyways, i dont care about anything but my peace cuz trust me i am losing it n feel i will have a nervous breakdown any time.please help me.