I'm not sure whether this has been asked, but how old are you?
*just incase you're very young..*
Firstly I'd like to say try to embrace yourself. Don't care what people think about your features, because your physical features are not what define you as a person. There is more to you than your breast size, and if someone dismisses you solely on the basis that you have small breasts, then perhaps that person really isn't that great or for you.
Secondly, I'd like to say that beauty is in the eye of the beholder, and whilst some people on tsr may not find your breast size appealing, that doesn't mean that every heterosexual male feels the same way.
Anyway, I'm sure you're beautiful and lovely, and nice on the inside (and out), so you have nothing to worry about.