It may sound strange coming from me since I'm male, but I can relate. Not about feeling beautiful, but about feeling like no matter what my appearance is lacking.

I'm a very short guy below the average height for women, nevermind for men. Because of this I understand what it's like to feel like you can never achieve what society seems to demand of your gender's appearance. Everywhere you go you are bombarded with images of physical characteristics that are beyond what are possible for you, and it really wears down your self confidence after a time.

I wish that I could tell you some method I've learned over the years that would enable you to reject that superficial side of society and define physical beauty for yourself, but I still struggle with body issues myself. All I can offer are my sympathies, and to say that it won't always be as in your face as it is now. As people get older physical appearance does decrease in importance, as does the pressure you'll feel to meet those impossible standards.