What are some good comebacks that you can say to a friend that is spreading rumors about you?

Well the thing is if she spreads rumours about you, you should never do it back. First of, you just said that she was a friend, so I guess you wouldn't want to hurt her. So you talk to her about it. Maybe she misunderstood you, or she heard it from someone else, so Do as i say. I'm experienced in this.