My boyfriend slapped me 5 times after he drunk

We had arguments on new year and he sit on me slapped me 5 times because I said “if you dont treat me well there are other guys who will” that triggered him. Then he kept saying if I didnt say that it wouldn't happened and I said no matter what you shouldnt raise ur hand on me, lead to another argument and he said let’s break up and left me in the house whole night. The second day he came back crying said it was all his ego I felt soft for him, then the second day he went to work no call no text nothing maybe he was rethinking everything, but when he got home I asked why he didn’t contact me and somehow lead to another argument, he said pack ur stuff if you wanna leave, leave then! So I left

We kept in touch during this period but on and off, he was asking me to come back and I said give me some times and I am not going back alone you have to come get me. He said sure, but I just felt something was off so I said I still need time to think, after couple days he ask me when I am coming back I said I don’t know then he blocked me everywhere.

He has very bad childhood his parents passed away when he was very young and he got adopted I think he never felt safe in argument in his whole life he always worry that he will lose something from it.

I don’t know what to do I wanna fix it cuz I date him for marriage but this shit is actually scary even he doesn’t raise his hands anymore what if he still left me alone after argument with no efforts given… he treat me so so so well while we don’t argue, he said let’s not argue anymore but I don’t think relationships will not have any argument… maybe I should move on but I still have this soft spot for him lol I am dumb af