For romance, I would have liked to see the girl with a more thoughful expression of waiting but I think it is a beautiful photo and you should definitely enter more challenges
Very pretty...only criticisms are: the angle of her foot makes it look big, she's looking out of the picture drawing my attention away from her, and she's holding the baton in the wrong place to be playing so it loses some emotion for me since it looks posed. I would prefer it if her head was angled up a little more and looking at the Cello.
The setup appears to have had a lot of thought put into it, but the girl looks too self-conscious to let this image feel as intimate as it might have. Adding a soft, diffused light behind the model would have helped to separate her from the background.
Nice elements of model, cello, and candles, nice composition. Image is too dark overall, try bringing up the midtone levels in PS. A little more DOF and more eyes would be better.