This is absolutely gorgeous! I love the flow of her hair and that sadness in her body language. Yet you can see a little hope in her eyes.
The shine off the necklaces are perfectly put, it's not too much or too little.
I love how you just blended it all together so well. The colors and feel of it all is breath taking.

The only thing I would ever have an issue with is the brightness of it all. I understand that the moon is supposed to make the shine and glow. However, since there is so much glow you can't grasp the beauty of the rose in the front. It seems to just fade in the background of her dress and sky. Perhaps if there was a bit more contrast, the details will show even more.

Either way, this is very lovely. And it was kind of you to dedicate it to someone.