No one wants to come to dd party

[Celp28]

My daughter is turning 13 on Friday. She has invited 9 friends for a sleepover and no one has responded to her invite. She has a so called best friend who has told her she doesn’t want to come and she doesn’t think others will want to come if she doesn’t come and that my dd is ‘a freak’. I’m so bleedin angry! Aibu to contact the girls mum to inform her her darling daughter is a bully or leave it?

Happy belated bday to your DD. I hope the hotel is fun!
Agree with others that girls can be very cruel. It’s not always easy to make friends out of school either, I Did, but I was lucky and determined!! I tried a lot of groups out until (at 14, year 10), it clicked. My own DD is the quiet type and although she’s done out of school groups,one for years which she got too old for, she hasn’t made lasting friends at them.
My ds is 13 and I would be mortified if he was bullying. He has distanced himself from His so-called bf, who’s very Unreliable now, i was annoyed the other week when they’d arranged a sleepover knowing ds couldn’t come as had a family party, but went ahead anyway (could’ve had it any time, wasn’t a bday or anything).

Happy belated birthday to your DD.

I hope your DD had an amazing birthday.

A daft thing to maybe take her along to may be kick boxing. I'm (at 35!!) just starting out as I've always wanted to learn a martial art. I go to an adults class which is for age 13 upwards. And as I'm new I'm with mostly the 13/14 year olds. There's only a couple of lads, but actually a number of girls, they all didn't know each other before starting, and most have chatted to me saying they were on the edges of groups and worried about bullying etc which is why they started. Interestingly these young women come into the class painfully shy in a way I remember being, but once they start training their confidence is awesome to watch. They laugh and chat and I even noticed some tentative cinema trips being arranged too. The older women (and guys to be fair) with higher belts in the group also make time for them and I've definitely heard a few of the older (but still school age/college) women giving advice on dealing with situations.
I was amazed at how supportive it was.

TBH you should ALWAYS have contact details for the other parents in case there's an emergency.