If your skinny, that might be the problem. when i was 16 i didnt have breasts either, than at 17 they kinda started to grow, im 19 now and im not even an A. I know how you feel, its embarssing not having any boobs. I havnt seen you so i wouldnt know if your situation is the same as mine, but im preety sure mine is because i dont weigh much, im 5'4 and 103 pounds. I wish there was more we could do to help. Wait longer, maybe you's just havnt started growing yet.