I don't know if this is any consolation, but I don't think that a "confession" would have worked miracles - she was planning to go, so probably she would have left anyway.
So, now that you are apart, think for a while and if you still feel the same, tell her! I guess that you have a way of communication, and now that you don't face her, you won't freeze, and she won't feel threatened in any way (don't get me wrong - likely she wouldn't consider you a stalker, but anyway the "real life" situation could be awkward for her too).
You see, I'm in a resembling situation, but our distance is much shorter. We are exchanging PMs. I don't know if anything will come out of it, but I think she's superb and now she knows that.