DD is so sad and unhappy. She was looking forward to a party for weeks and had invited her "friends" to her house first to get ready and then come back from a sleepover. Then one of her "friends" decided to turn it around and have the sleepover etc at her house. My DD and her friends all agreed then this "friend" decided to exclude my DD. All week she has been trying/begging this girl to change her mind but no. They blocked her and excluded her. Now she won't come out of her room I can't get her away from her phone. I texted one of the mums I have known for 3 years and said I couldn't believe what the girls were doing and what happening and she has ignored me. I want to text the bully's mum but I can't trust myself for what I might say. I can't bear to see her in so much pain. She is utterly dejected. Any ideas for cheering my DD up?