It's absolutely beautiful. Your coloring is - well, I'm jealous! Too pretty.
Because everyone else has covered what I saw - arms, shoulder, etc - I'll assume this was intended stylistically. One thing you could do is give her a bit more forehead - at least the same as the distance between the eyebrow and the eye, if you need some help figuring that out :)
I love the eloquence of a long neck. <3
Critique me back, please?