Way too many images for which to provide detailed C&C, however I'll touch on some high points (in future, 4 images max pls, and number them).
1. Something seems a little off with the skin-tones & WB, but I can't say for sure. Watch the crop- bits of toes & feet missing. Was this really the best background you could find???
2. Wonderful expressionl; go either portrait or square, and again watch the background. Those lines are very distracting.
3. Flare is a personal taste, but not my taste.
4. Crop - you've cut her fingers off, fill needed camera left.
5. Nice - a shame about the tree growing out of her head.
6. Your camera will work when turned 90 degrees counter-clockwise. Really, it will!

Drop the exposure & contrast down just a bit.
7. Crop - top of the head missing on pink-striped-shirt gilr.
8. WHY did you crop the heart and leave all that dead space image right?
Overall, they're not bad assuming that this was not a paid shoot. Your WB is all over the place, and your crops & compositions need some work. Keep practicing!
Just my $00.02 worth - your mileage may vary.
~John