Is she just angry, or is she sadistic?

I'm a little naive when it comes to relationships, and it's possible that I've upset a girl. Now she hates me and wants nothing to do with me, but sometimes it seems her actual goal was to get me interested in her and then just leave me hanging. When I tried to work things out, she got worse. Some of the many things she's done are lie to me constantly, attempt to humiliate me, attempt to get a fight started between me and some other guy, permanently hurt my relationship with my mother, called me up one day saying she wanted to make me cry (during this time she was not angry but just relaxing with a few of her friends), pretended to be someone else online and then proceeded to be aggressive and ask invasive ual questions while insisting it wasn't her, and you get the idea. She was very pleasant and easy to get along with when I first met her, and really I hadn't had much experience with women prior to her. Was she responding with anger or hate, or was it deliberate sadism?