I've been through this before so listen when I say this, there is no friendship if she turns you down. You can't be friends with someone if they have shat all over your heart, regardless of what you fool yourself into believing. With that said, just tell her. If you like her more than a friend, you can't go on just being her friend, now can you? But if she says no, you just have to move on, otherwise you're just hurting yourself by still being friends with her and wanting her, but not being able to get her.