I like the cute serious pose. A couple of things aren't quite working for me.
1st, the very bright area to the left of his face pulls the eye away from the boy.
2nd the composition feels unbalanced, so I would crop.
3rd, the color doesn't seem right. It either needs to have more saturation or the color should be removed.
I have 2 quick work ups. A B&W and then a Color version. The Color version includes some subtle vignetting to darken the background and help the boy stand out more. Oh, and initially I toned down the highlights on the boys face some.