I have the urge to smack you on the head. So you have been interested in her for two years, and now that she's free, you don't make a move, even knowing that she has shown interest for you? What more do you need, that she rapes you?

Pull yourself together, and go speak to her, ASAP. Don't hold your breath for her approaching you, you rejected her once, I think that's enough for her. Which does not mean that she'll reject YOU.

If you chicken you on this, you for sure don't deserve to be with anyone.