don't worry about it, even though its easier said than done. i wasn't happy with mine until i got with mr miniN, and he tells me how perfectly proportioned i am. its proved i've changed as a few weeks ago when i changed my pill my boobs grew (quick alot) and i was quite worried about it, thankfully it was only temporary! be proud to be a bit different! just think, no saggy boobs or back ache.
i'm sure as you get older you will feel differently and will come to love what you've got. x