Well here the situation there's this girl, there always a girl but anyway I've known her for years, three at leats, and we get along very well. We always pick each other for projects, every time I talk to her I'm not nervous yet with some other girls I do, she is amazing, as a frined but now since high school is ending these feeling I have for her are getting stronger. I think its because I don't want to lose her, cause its true what people say you will hardly see your friends in high school and I'm a terrified of losing her. So what should I do?

Tell her how you feel

Your answer above is simple, clear and straight to the point.
You have nothing to lose in doing so.
So pack up courage and tell her how u feel before its too late.
Good luck.

Hi,
I agree with telling her how you feel.
I also know that in many, many cases of "friendship", it does not end in a "loving" relationship. Being friends for some time does not mean loving each other. There is a difference.
Let her know you want to stay in contact with her, and even ask her out on a date. Find out how she feels about you. and how you feel about her. I do wish you the best, and good luck.