You live, you learn. I was an ugly kid so I know first hand that looks aren't important and I know how people judge based on appearance... it's given me a bit of a complex about my own physical attributes or lack of, but I'd rather that than to have grown up an arrogant, self absorbed arsehole, lol.
Apropos growing up with a complex... There was a guy I really liked when I was in high school, but I was too shy to say anything, and since he was one of the popular ones (painfully good looking), I never thought he'd be interested. I'm never happy with what I see in the mirror, no matter what I am told. So, I cannot even begin to explain how much confidence it gave me when ten years later, the guy told me I was the one girl he had wanted to date, but never dared ask out. Apparently, he thought I was too smart for him 
My point is that sometimes it's just teenage awkwardness that gets in the way. It is too bad that it ends up having such a tremendous effect on an individual, though. I think it is a lesson I will try to teach my kids - if I'll ever have any 