Firstly - I hope you don't mind me editing your image!
I found the original lighting a little flat/vague, so I have tried to brighten the far side of her face to even out exposure across her face a little more, and worked with the dodge tool to help define the shape of her nose. (Hopefully) Both these changes generally make the lighting appear more directional, while still retaining the smooth soft look of the original image.
I also darkened the area under the chin to focus attention on the face more, and brought out the highlights and contrast on the eyes slightly to increase their impact on the viewer.
If the re-edit is an issue, let me know and I'll remove it a.s.a.p.
(There is differences I swear! Might need to save both and flick between them. I liked the subtle tones, so didn't want to go heavy-handed with the editing...)