Before I give my view on the second part, let me clear up that I don't know that feeling, the feeling she was going through so I don't think how right I can be but the way she behaves through the whole second part made me grow a bit of disliking towards her. Again, I read that book three years ago I am telling you only how much I can remember. But yeah, i didn't like her second season. When she indeed became the one to sleep around. It's her choice, it was a coping mechanism. Her way to fight away her fear. To remove his dirty hands from her body. And I think it's legit.
But the way she hurt people who tried to help her. I felt the most sorry for her best friend like the girl did her freaking best. But then again it was not easy for our girl to talk about ANYTHING. So yeah, again, not much of a fan of her in the second part.