I would tell Toni that everyone makes mistakes
I would say just be her friend again.
I would say "Toni, Carley lied to you because that she was nervous about telling you and that you two should be best friends again."
I would say could we be friends?
I would tell Toni that nobody is perfect and I made a mistake.
That she was lying to keep being friends with her
I would forgive Carley and help her if she has any further problems.
I would say that you should be her friend and everybody makes mistakes
I would tell Toni to be nice to Carley, because she has gone through a lot.
If I was carley I would say to Toni I know I have made mistakes everyone does can we be friends again