Teens: What should I do: I never thought this pain while last so many years?

I think that even though it haunts you that it has to become something that either makes you stronger or defeats you. Do not let it defeat you. Use it to give you strength. Look in the mirror every morning and tell yourself "I Love you" Even though it sounds nutso and lame it works. Love who you are. Everyone has things in their past that hurt them but it is the successful and the prevalent that take those hurtful things and use them to get strength. I do not know if you are religious but you can always pray for god to give you strength and courage. It has helped me. Even if every person on this earth told you that you were beautiful you wont believe it till you believe it from yourself.