If your self-esteem really does depend on how you look you're always going to be insecure. There's no way you can get around it because you are going to age. Even if you get that perfect body you're going to get older and older and older. You can't avid it. So you have to somehow, at some point, take control and sift the focus and decide who you are, what you can contribute to the world, what you do and say, is so much more important than how you look.