Well it is basically if you don't share a behavior that she is taking serious then she is a wimp type and accepts you unconditionally. If you all survive in this way then that is totally acceptable. I can't diagnose you either. Friend might be showing you that they can put that aside an remain friends. I would keep a journal on what you might be experiencing, in life we need cathrathic moments because your are required to be mean about something in life, right. As for the trend in music that is totally acceptable it could be a way to keep a friend in another aspect of your life.