How to deal with being jealous?

My best friend is quite the find: she's beautiful, stylish, charming, funny, and has a certain whimsical spark to her. I've never met anyone like her. I love her to death, but the attention she gets when we're in school is maddening. And the thing is, she is very reluctant to respond to male attention and is pretty avoidant. I don't consider myself ugly or plain, but I'm more laid-back and tomboyish, and a wonderful personality, so I'm definitely in her shadow most of the time. So much about her relationship life stands as a cruel and stark contrast to my own. I feel so inadequate next to her, even though she affirms me as a friend whenever I bring this up. It really highlights my insecurities about my own femininity and worth as a girl. Our relationship is starting to languish because of this. We are 15 and I really want to have her as a friend when we get older. How do I get rid of this resentment and have a healthy perception of myself as her friend?