Girl, I need ur help.?

I've been friends with a girl who i like for a while. Well, this other guy interfered and told her that I liked her, but now I like someone else. So he told me he did this and I was angry and I told him to fix it and he didn't want to. So when I saw her it was normal except she thought I still liked her. So I text her about how my friend messed things up. And she said that I cud have just said tha I didn't like her. And I was trying to explain what happened and she got even angrier and she said she didn't care what he thinks and that she just wanted me right nw to tel her that I had no feelings for her. And I did. And she said THANK YOU. And she said that I am taking it worse than she is. And I said okay. And she sid that she was gonna go now cya:) and she left the facebook chat. But she was still online with her other friends and I'm sure she is telling everyone what happened. And plus one of her friends were with her when this hapened. I feel like a retard and I don't know what to do?I'm scared to see her on Monday. What did I do wrong? And she has never had any feelings for me.