Is it normal dd12 behaviour

[Wowzer67]

To constantly change friends, 1 week 2 of them are best friends, the next 1 is left out and 2 are going off! It just seems exhausting!

Ah yes the whole boyfriend/girlfriend thing is awful, especially with social media. The amount of times my DD would be "talking" to a boy, she'd tell a certain friend about it and then that friend would start messaging whichever boy it was too! DD wasn't like that at all so found it all very annoying and didn't understand why a so called friend would do that!

I learnt quite early on to just let DD rant at me and not give much of an opinion so that she didn't think it was more of a deal than it was (even though sometimes I wanted to throttle some of her "friends" for upsetting her!). I didn't have many friends at school so made sure I wasn't projecting

Has she just started Year 8? I think in Year 7, a lot of people cling to their primary school friends or the people they meet in the first year of secondary whilst gradually getting to know other people and also figuring out who they themselves are in this very different environment. This means that, during the summer term, those initial friendships (even the long-standing primary school ones) are beginning to fracture and there can be quite a shake up over the summer holidays. When they come back for year 8, there can be quite a change and each change has a knock on effect for everyone else in that group and each girl in it will react differently, which then has further knock on effects.
Chat with your daughter and make sure she's not being bullied or being a bully and suggest she tries not to get too involved in the day to day drama of it but just stays friendly with everyone and sits back and sees what happens. That worked for my DD last year. My own solution several decades ago was just to get involved in a lot of clubs as I got so bored of all of the drama of it all.

My year 8 has had a few changes in friendships
over this year. Only one that seems to have been a negative experience. She seems to have been pretty happy despite all the chopping and changing. It all seems to be fairly settled now though as they go into year 9.
We we’re told by school that year 8 was the worst year for friendship problems.