Welcome to the forum, you'll find lots of help and support here.
I'm 16 too, and I DO think my gyne was from me being over weight (5'3" 170) and its made me very self consious and shy, so I know how you feel.
It depends on the severity of your gyne. Usually the smaller the gland behind your nipple is, the more likely it will go away (I think). You should post some pictures to help us to help you more