Sometimes if you are a little self conscience about a body part, it helps to keep you from being promiscuous. Find a moral young woman who hasn't slept around and believe me she will be happy that you are smaller, the larger ones can hurt. Also, being large does not mean good in bed. I would much rather have a man that is passionate and attentive in bed. Good luck to you.
There is no cure you just have to be happy with what you have. Build your self esteem. Better to have that as your issue than dying of some disease that there is no cure for. Be greatful for your life and dont worry what other people think. Life is too short to care about things like that. I used to care that I had a small chest but you know what? it doesnt matter. I love myself for who I am and how God made me. I am sure that you are fine.