Cute. Heh, who wouldn't love to wear the clothes of one's crush?
For a bit of constructive critisism, her hands are way too small, and you should put more folds into their clothes. You've done well on that part in Sasuke's (temporary) outfit, at least regarding the sleeves, but since the torso is quite bulky as well, it needs more folds. As for Sakura's dress (which is currently not worn by her), since it sticks close to the body one would think there would be no folds, but a tight outfit actually creates more folds than a loose one, just smaller. The same goes for thin fabrics as opposite to thick ones. For a good illustration of this, observe how silk folds.
I would say you put their crotches a bit high; Sasuke's seems to be located at the same place as his waist...
Lastly, I think the colouring is somewhat light. If we are to go by the anime, the gang's clothes are all of darker hues than in your picture, and if I were you I would have given Sasuke the skin colour that your Sakura has while she would have gotten Naruto's. At least in my opinion, Naruto should have darker skin than that. Their poses and facial expressions are very good and expressful, though. Â
Overall, nice picture. I hope you find my comments useful. ^^