I need some advice please?

I have been with my B/F 2.5 years we are both 28, we had broke up for 6 months last January we got back together, we brok up due to i heard rumors he had been in contact with his ex, he is a very stubbron man and thinks i should have just belived him so he refused to show me his call register, naturlly i walked away and he text me the odd time here and there, as soon as i got with someone he wanted me back (he said he wanted me back all along but i gnored or was blunt when he text) anyway we did get back together and have been since May i moved in with him in June and every thing was really perfect, we argue a lot donw to me not trusting him over the ex situaton but to be fair before we broke up i didnt trust him anyway, i have been cheated on a lot in the past, in the last few months we argued over petty things it was me really being a ***** as i tough because i took him back he should take my moods and giving out and my conctant threathing to leave, any time i did go to leave he would beg me not to go and even at some points threathen to kill himself, i questioned his every move and phne calls ect i got away with having big hissy fits and saying mean things, i tought he really loves me and this break up made him realise how much he needs and miss me....however in the last month this has stopped, if i go to leave he lets me, if we are arguing he speaks to me horrible (now im no angel) i speak to him horrible to but its as if he hates me all of a sudden saying hes sick of me and my negitivity and how hes not alllowd go anywhere or do anything with out me questioning him, all the nastiness he had towards me before the break up is back again, now like i said i probably do draw him out 60 :% of the time but he is just constantly annoyed and sounds really fed up of me, he told me last week he wasnt happy anymore, he said to me last night im acting like a mad women, i keep saying ill leave hoping it will give him a fright to go back to how it was...thing is i do love him and i dont want to be without him but i couldnt go through a break up with him again i have no friends to go anywhere with there all settled im 28 years old and am afraid ill never find someone, thing that hurts is we were so perfect till now