Scared my Bf dislikes my boobs

I (19F) feel so uncomfortable with my boobs. I find them so ugly, I have bigger ones and always thought that was why they sagged a bit, but that's not the case for some others with big ones. In addition, my nipples are slightly down (not in the middle) and my boobs are not round at all, but rather, I don't know how to describe it, like bags. I also think my chest is much too wide. In addition, one breast is larger than the other and somehow I have the feeling that they are placed further down than normal. There is a larger gap between the two. That's why I don't dare take off my shirt while having sex with my boyfriend and I know that he'll always be disappointed because of it. We've been together for a year and I don't know what to do. I'm afraid he'll break up if i keep doing it. But what if he think they're unattractiv? I love him so much, i don't want that. I really don't know what i should do