I was going to post pretty much exactly what Mrsmac said: brace yourself and let the friendship run its natural course. A very similar thing happened with my DD at that age. It took about 1 and a half years for the friendship to run it's course. You will have to listen to lots of high drama and there might be a few early rays of hope (when they have inevitable temporary spats) but if you can bite your tongue and just keep offering a calm port then your DD will soon wise up and set sail in a new direction. Oh and I also agree with Boobaloo... very good points.