Thank you for the question.
Unfortunately, it is not possible to give you good advice without direct examination, the problems your breasts are causing you, and your goals.
As you think about breast reduction surgery make sure you do your homework and understand the potential risks and complications associated with the procedure. Unsatisfactory scarring is one of the potential complications. Make sure you also understands that further surgery may be necessary in the future (for example if the breasts were to grow in size again).
On the other hand, breast reduction surgery is one of the most patient pleasing operations we perform and I think that for the right teenager (enough symptoms) it may be an excellent option (regardless of the age).
At some point, it will behoove you to consult with well experienced board-certified plastic surgeons.