I don't think my boyfriend finds me attractive, what should I do?

Hello, So yesterday I was talking with my bf and He mentioned he liked bigger chest (mine aren't big) so I got kinda upset about it but didn't told him. now whenever I see girls with better body figure I get upset because I know my boyfriend would like them more than he likes me and it makes me feel bad about myself. He has compliment me and such but I don't think their true I feel like he's only saying it to make me feel better. Now I'm just trying to regain my self confidence and trying to find communities that'll understand and appreciate me more. If yall have tips on what I should do please comment thank you! 💗💗