Can my relationship be saved?

My boyfriend and I have been together for 4 years. We live together and share bills together. Lately, things have been out of control, mostly arguments over nothing. I know that I'm the reason he's pushing away. This man loved me like no one else. I've never been in a serious relationship nor have I seen one. My parents fought constantly, verbally and physically. My mom treated my father exactly how I treat my boyfriend. I still carry that anger and resentment. I carried this foolishness into my relationship and he's tired of it. I cross the line when I hit him. I didn't mean to I was so frustrated. Now, he barely says anything to me. Sometimes he don't come home because he don't want to be around me. I'm so scared. I don't want to lose him. I don't know what to do. He told me he was tired of dealing with my craziness and he can't forgive so easily especially after I hit him. I feel like I'm becoming my mother. I just don't know. He still helps with the car when it needs to be fix and he sleeps in the bed with me but he don't cuddle me like he use to. Is there hope? Is it possible he want leave me. What should I do?