So my ex girlfriend is pissed at me, and wants to put a restraining order on me.?

It goes like this, I had a chat with her new bf, and told him she kissed, and said she wanted to be with me. So I told him everything, and now she wants to put a restraining order on me. So since she has been spreading lies about me, and I did buy her a computer, I think I should sue her so slander/defamation of character. What do you guys think?