Why is she angry with me?

So me and this girl have been together for about 2 weeks and one day I email her asking whats wrong. She says that she's confuse and upset and then she gives me a list of people she can trust mistrust and people that she doesn't know if she can trust. I on the doesn't know list and I ask her about the whole upset thing and the list but she says that nothings wrong. After a while she says that there is something wrong but she won't tell me. The next day at school we are fine until our last period which is study hall. I just ped her a note because we sit next to each other and give her a small compliment. Nothing that someone wouldn't give to a friend. Then she just explodes on me saying how I worship her and how she doesn't like it when I really don't that night I emailed her asking her what it was all about and she just said that she was moody. I found that had to believe because she was laughing with her friends next to her while she bombarded me with insults. This wasn't like her. She was always really sweet and sensitive with a bit of a rebel side to her but not much. I've known her almost my whole life so I know how she acts. When I asked what happened to the old her she said that she changed herself because when you care about someone you end up getting hurt. So the first thought that came to me was that I hurt her but I didn't physically, or mentally, or at least not to my knowledge. I have no idea what happened or what to do next. Ideas?