I love cherry blossoms. Such beautiful trees. I like the way you've composed the piece with an overall matching heart shape. It brings harmony to the piece. The colors are light but cold which depicts her mood nicely. The color of the character and the background is too similar though. It makes her look washed out and takes away focus from her. If you don't want a competing color, maybe add more neutral greys to her just to define her a little more. I also think the smoke looks rather half-assed in comparison to the rest of the painting. It just has a very unfinished appearance to it.