What do I do? Why would she say that?!?

I lost my iPod a few weeks ago after my friend logged on to her Facebook. I found it today and forgot she was logged on. I looked at the messages and it was her and this kid Tom talking about me. Tom said I was ugly and that my face looked fuc**d up. Then she said that I wasn't the most gourgous person in the world. But she always tells me that I am so pretty and that she is jealous of me. Why would she say that? Who is she lying to? Should I tell her I saw the messages?