My daughter has a best friend - they've been inseparatable for the past two years.

The past couple of weeks her BFF has been treating her so badly that my daughter has come home crying day after day, (they're in the same summer camp). The camp they're in is a performance camp. My daughter got the solo for one of the  numbers the first day of camp, and her BFF has been glaring at her, and excluding her all week. She's also talking about her behind her back, (another friend called my daughter and told her what was said...).

My daughter tried talking to her, the BFF claimed "nothing was wrong", and made it sound like it was all my daughter's imagination. But the next day it was the same treatment - didn't even say hi, and they're supposed to be best friends. I asked my daughter why she didn't just go over to her friend and say hi. She said that she was afraid that it would only make things worse - that she could tell this girl didn't want to include her.

I'm so mad, and sad for my kid. I can do without this girl in her life, (clearly nobody needs this kind of friend), but know it will take time for my daughter to get over this.

Any advice?