Anyway this is good. I like your idea of roses and you did a good job reflecting that theme. Also the detail drawing with the soft coloring and the rose shape effects are really impressive. I think it was creative of you to use a huge rose as the special affects as well as for the background.
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I know you didn't ask for a critique but, I with good intentions, wanted to point a few things out. It's obviously open to your whether or not you want to change it or even pay attention to this comment.
While this piece is stunning, an interesting mix of rendering and flatness and a good use of color to bring things to and out of our attention, I keep coming to the "our right" hand. It feels very off to me, perhaps the thumb side of that hand is too big? I feel like we'd actually see the thumb or where the thumb connects as well as perhaps a knuckle or two more. I also like the placement of everything with the exception of the one petal touching her cheek/ear. I'd suggest to either make it bigger or smaller, there is a bit a of a tangent of it touching the edge of the ear.
Again, other than that and as many have said before me, it's a beautiful piece.
I like how the slightly transparent layers create depth to the picture. I think it's the lighting that gives it a feeling she's inside a world of her own and everything else is outside, unable to disturb her thoughts.