Insecure..

So... To be really blunt and simple. I’m 19. I wear a 32A. My chest is almost completely flat and it’s something I’ve been made fun of by my sister my entire life. My boyfriend one day said “you may not have any boobs but it’s a good thing you got a nice ass.” All of his exes have bigger boobs. And he doesn’t ever touch my boobs. I had to beg him to start taking my shirt off when we had sex. Idk what to do about it...