What Is the Problem?

I fought with my boyfriend last night and the same argument still last tonight. I don’t understand that why can we had so many fights. I hate arguing or fighting with others especially my boyfriend. The truth is that I seldom had them with my friends but it always happened between my boyfriend and me. Sometimes I didn’t mean to have an argument with him but he always got angry easily. Then, he started to argued or fought with me. I really hate it because sometimes it was just a little thing that was meaningless or sometimes it was just a misunderstanding. I really want to know what the problem is between us. I know it’s impossible that there is no any argument or fight in a relationship. I hope that we can find out our problems, discussing them together, and solve them in the end.