Undecided Question

How do you find true beauty and what is it?

My name is Marie and I'm thirteen years old. I recently created a facebook account. On facebook there is an application which allows my friends on the site to answer yes or no questions about me. I was looking at what people at my school thought of me and I was pretty amused. People thought I was a good cook and funny. I looked further and noticed some of the guys in my grade(and in a grade higher than me) answered the question "Is Marie hot?". I was hurt when many of them selected no.
I attend a middle school with about 1,000 kids attending, majority of which are caucasian. I am one of the few African-Americans who go there. I also am in all of the advanced classes my school has to offer including Geometry. At my school many kids call me a nerd because of my glasses or even make fun of me. They say things like "look at that black girl" or "that black girl is such a nerd". These things can be hurtful to me at times. At lunch I hear some students calling the other African-American's at my school racist and degrading names and I don't know what to do. Even my friends think I am less than them because my race is different from them. Guys call me ugly and people hardly notice me. Many people call me anorexic because I am 5'7 and weigh 116 pounds. I also have a stuttering problem and I get nervous when I'm in conversation because I fear of saying the wrong thing. How do I over come this?
Whenever I go out to places with my family people(s usually) stop my mom and say, "you have such a beautiful daughter" or "your daughter would be a great model". I never know if they mean these things or if they are just trying to be nice. I was just wondering what makes someone truly beautiful.
At school the most beautiful girls are the ones with long silky hair and tan skin. They are the ones who are the loudest and very full figured. Most of them are mean and rude. They walk over the quiet people like me. So what is true beauty and how you get it?

Thank you