Should I admit to my boyfriend that I purposely stop taking my birth control pills?

I've been with my boyfriend for 9 months off and on. I really didn't get to know him very well when we first met. All I know was that he was HOT!!! He had hazel eyes, 3 dimples, goatee, jack black wavy hair, 6'1 and a muscular body (he's Cuban). I'm black btw. He's the most handsome man I've ever been with. However, as I got to know him, there are few things that are wrong with him. First he lives with his mother and doesn't pay rent. Second, he's an alcoholic. Third he's a addict. He goes to strip clubs every night. Fourth, his does not have a valid drivers license and 27 yrs old. However, he does have a great job as a brick layer and he's in the union. . I'm a single mother with two children by two different men. He has left me several times. It's almost like he purposely starts fights with me. I admit I am very jealous. I screen his cell phone calls. I check on his IM on yahoo. I did find out he's seeing when of his FWB. I also found they were IMing each other. He told her how much he missed having with her and that he wishes he was single!!!! I even found naked pictures of her. I'll admit she's gorgeous. She's supposedly half black and arab. . Anyway, I know I should leave him, but I just couldn't I was too attracted to him. I don't want to leave him and I want this relationship to work. So I stopped taking birth control pills without telling him. He asked me to get an abortion, but waited to late on purpose. That same night I told him that I was three months pregnant by him he blew up at me and left. Then I found that same night he went to go be with his old FWB. I don't know what to do?