I've been through this back in high school. All you can really do is tell her how you feel and try not to be too spazed out when you do it (it'll only make you look stupid). If she doesn't choose you then oh well, at least you tried and in the end it's all you can do. Also, don't burn bridges with her, she may have hot friends ;)

Myself and a long time friend fought over a girl once, turned out she wasn't worth fighting over, matter of fact we laughed about it a couple of weeks ago over beers :rolleyes: