Boyfriens

My bf always brings up my past after 2 years down the road , he used to call me a coke head hoe when i wasn't i was just experimenting! I tried it about 7 times and i admit I was young and dumb ! He always talks shit to me about what i use to do , who i use to kick it with and who i used to talk to " but how can a past be the past when he allllllways brings it up ? Im his words he says " every time i gets pissed at me you i think of every dick you sucked " But I never sucked wny dick but his! Im in an mentally abusive relationship i cry alllll the time, i need advice. What do i do ???