I have a crush on this girl. I need advice before i do anything. Help?

I think it would be good to at least tell her so that your mind is at ease. No matter the outcome at least she knows. But basically, start dropping hints before hand that you have feelings. Try and make them pretty obvious, but do this gradually. You dont want to shock her over it, which is usually the thing that causes friendships to end out of no where. I think that you should simply tell her the truth. If you are in the friendzone the only way to get out if by telling her bluntly. But if you are in such a deep friendzone then, despite her not wanting to date you, it wont ruin your friendship with her. Dont think too much about it, just go for it. Best of luck mate.