I think you're going to have to let this one go mate.
If she doesn't text you or accept you on facebook and you can't meet up with her then I can't see any other way other than accidentally bumping into her.

You could try as a last resort sending her some random text messages, after all what have you got to lose. Try "your shit" there's some other stuff like this in here Flawless Natural Video Blog » Blog Archive » Tim’s Phone Game Exposed