I'm sorry that happened to you. I can relate since I had a friend do the same thing to me. She blamed me for everything because she was depressed and almost caused the friendship to end. In fact, even though we still hang out at times, I definitely don't feel very close to her due to how she treated me. I agree with other posters that she acted out due to her depression and the fact that she suddenly got violent makes me wonder if she is bi-polar or if she has another issue that you are not aware of. Hugs to you.