Heartbroken, suicidal..need help...i feel weak.?

me and my fiance used to argue alot and each time he left me feeling guilty, yet vunerable and always the one to apologise because i really didn't wnt to lose him. Hes my life and i really believe hes the one for me but a few times now we've come so close to breaking up its scary. Each time i'm left heartbroken and in tears. He promised me he wouldn't hurt me again but now he created an argument out of nothing! he told me he doesnt care about me and he couldn't give a sh*t. The pains never been so bad before. i cant sleep or even think. i love him so much i just wan my pain to end. its selfish but i really jst feel like dieing. ive done so much for him,u wouldnt believe what i went through just for him.i had 2 fight my family n frends bcoz ireally believed hed b ther. now i think that was pointless..im alone, i feel used,unworthy and really low. i want him still, he treats me wonderfuly usually...but i cant take this pain..im diein on the inside..cnt stop cryin..someone help me.?!