I guess you only have two choices.1. Ask her out. You are now seen as different person from her side. You are now categorized as not-just-a-friend. Be careful, if she refuses you. It will be so awkward. You take the risk to get closer to her, while on the otherside, the risk out your friendship.2. Just stay being friends. It's hard. Having good looking girl around and can't getting closer. You just have to forget her and find another. This will save your friendship.That's what i'm thinking if i'm in your position.