Sorry but it's boring. The subject and immediate surroundings are doing nothing to keep my attention, so including more (possibly even what is being waited for) might have helped.
There seems to be a lot of noise in this photo. Maybe it was shot at too high an ISO setting? Neatimage or some other program might help clean it up. I like the emotion in this shot.
An additional element would help clarify the subject's expression as one of "waiting" vs. pensiveness or sadness. The fuzziness (hopefully from the window's screen, and not a flaw in the camera hardware) eventually works against the image...
is she behind a window screen or something? the noise/texture is very distracting. perhaps pull back and show the window frame and remove the screen...just a thought