I feel you have quite a few different options in this situation. You can either "let her go, and wait to see if it is meant to be by her return" or you can take the risk by putting yourself out there to her. Show her the love you have for her. Another option would be, letting the relationship and your feelings go. As hard as it may be to accept the pain that comes with this option. It will eventually subside.

Whichever option you choose to pursue, until you move forward with it try to keep your mind, ears, eyes and hands occupied. Distraction helps a little, not 100%, at least until you know for sure what you want to do. Hope this helps, even if it's just a little bit.