A bit too centered. It would be more effective if she were over to the right (her left) about one head width. Also, the bush on the left woudl be better in focus or out of the shot. The background being out of focus is good, but that bush is too close to the subject and distracts. The lighting is also a bit harsh, with too dark of shadows on her face. A slightly different angle or later in the day might have helped, or a reflector or or something to spread a kinder light on your pretty subject.
Fun portrait - though the light seems a touch harsh - for the model too, whi seems to be squinting a little. Perhaps a small reflector (needn't be any more complicated than a piece of white paper) to fill the shadows on the right side of her? Decent work.