Confused/ disappointed/ frustrated/ mad/ feeling stupid

Perhaps a lot of you don’t understand or care but I feel very confused about my relationship. I been dating my boyfriend for 4 years. I met him at a restaurant at used have. He would go eat everyday and from there we started talking. He was very quiet at first but then his personality change. He became funny, sweet and super humble. I didn’t really like him at first I just like him as a friend. But then my feelings change and I started to like him more and more until I fell in love with him. However, things have change so much. He is so different know. He hurt my feeling all the time. He calls me names and he never cares to say sorry or anything. Whenever we fight. He does t ever care to fix things. I have been the one always fixing everything. He always acts like I am the one that brings problems to the relationships. He has never really bought flowers or smalls gift to show me that he loves me. Not that I want him to but I feels like it’s nice when your boyfriend spends time to think about your. You know small details counts the most. I am the one calling him and when we talk he doesn’t seem to be interested. He is never interested in what I like. Omg. I have so much to say about this relationship. I feel so hurt and frustrated. He tells me that he loves me but he hurts me. I don’t know how to get out of this relationship. I don’t understand why i am so scared to leave him.

I say that I love him but then I think about how can I love someone that hurts me so much and is not willing to give his everything for me.