i feel like there will never be a way out

from the time I was 12-16 I was with a very abusive person but I met my current boyfriend at 16 and he told me that love was not sexual mental and physical abuse and that I deserved more then what I was putting up with so I finally left him but i was soon to realize it wasn't going to be as easy as I had originally thought it was going to be it's been three years and Im 18 now and I finally was done letting him run my life and ruin my happy relationship every time I had flash backs and took out my anger and fear on my amazing boyfriend so I finally wrote him a long letter telling him what he had done to me was not okay and that it distroyed me as a person and I was done letting him have control over me I sent it to him blocked him on everything I had but yesterday night while at my boyfriend's his mother took me aside and asked if I was putting sexual assault chargers I said no and now he's denying he did anything to me and saying I tried to baby trap him when it was him who got me pregnant at 14 and then stressed me out and pushed me making me fall making me have a miscarriage. why does he after all these years still have to run my life I know people say not to let them run your life but how do u not let them run your life after being so scared for so many years.... please help