Wow, sounds like you've waited too long. She's probably going to break your heart dude.
Women like men to be assertive and go after what they want.
She probably thinks of you as a friend because you put yourself there, she's not putting you there. Men put themselves in the friends zone not the other way around.
You are in damage control now, and it can be resolved but your going to have to act a lot differently around her in order to resolve this.
She probably thinks of you like a sister does a brother.
To really undestand women you can take a look at this. link
Its only meant for men to read.