this a good image, I feel a different crop would have given it greater impact. Her pose tells a story rather than standing as study in form and light. Therefore she is too centered in the image.
I'm unsure of the story you are trying to tell but what I see is one of mystery and isolation. So isolate her. Give her some negative space.
I realize art is a personal thing but looking at the image I see dispair and loneliness. To enhance the mood I isolated your image on a larger black canvas moved it to the right side. I then took a piece of the right side of the trunk, flipped it and used it to add a frame to the left side further framing her isolation.