The flower is a nice touch. the stray hairs are distracting. There is something about the crop I'd like to be different, but I'm not sure what exactly. Nice focus.
Not a bad image, by any means. I like the composition, but there are a few things that, for me, keep the image from being effective: the stray hair across her cheek is distracting, the line of light down her nose might be better off minimized, and the flower casts a shadow over the space between her nose and her upper lip.