Wow this one seems deep, the sadness comes out in the facial expression here. The cold stone like eyes with darkness draws you in to their soul and sadness. You have a unique style here with skin coloring being blue and hair being pink. The small detailed textures inside the hair were wonderful and really brought it more to life. I think the text is nice, but the background transparent shadow for the text reminds me far too much of snapchat text and took me out of the art a bit. I think just try maybe a glow effect around the text next time to keep your theme going.
~~THINGS TO IMPROVE ON~~
Improvments to your text background is all you need here.