I love it. It's pretty cool how you decided to do the colors, it really helps give the drawing a more soothing feel to it. I would've liked to see you try to do the hat's texture as it seems like quite the challenge to make. Very nice piece as is regardless, really good job
This is probably just a personal preference for me when it comes to black n white pics, but i think instead of just subtley coloring the clothes, it should be full n brightly colored, just like the girl's eyes, particularly for the scarf she's wearing.
The slight shade of pink just doesn't seem to make the pic pop as much n doesn't really compliment the brightness of the eyes.
As for how it's drawn, it's looks very much like the photograph n the shading is real smooth n soft-looking
That's a good drawing. You should eventually give more attention to shadows instead of lines. And have a real good look at the eyelashes - their direction, f.e. Maybe you should give some more work to viewer's right eye.