It my oppinion that the real issue here lies not with your physical attributes, but with the way that you see and percieve them. It is known that body image has a huge influence on self asteem and self confidence.
Learning to love and respect yourself is, I promise you, One of the most useful 'skills' to practice! If you master it while your young, You can avoid alot of stress, anxiety and depression at a later date.
It is again, My personal oppinion, And I'm sure alot of deicent young guys would agree with me, that beauty is present in every human form regardless of shape and size.
Maybe your breasts will develop and become fuller, Maybe they wont. What I'm trying to say is It shouldnt be important.
Shakespere said: 'To yourself be true.'