Help for dd - how to deal with tricky friend

[posey]

Dd is in Y8, goes around in a group of friends, about 10 of them (girls and boys).
Very easy going, no exclusions, no pettiness, no jealousy, (very very lucky I know).
A girl called X has been an on and off vistor to the group, now more on than off, and is causing all sorts of ructions. Where before there was light hearted ribbing,non-malicious, she is being openly bitchy, trying to cause ill-feeling, very needy, moody, controlling...
Already one of the group has gone off with other people as she found it all too stressful, another now spends lunches in the library just to get some peace.
Dd and 2 of the others would always walk home and gently mull over the day, she is there generally causing ill-feeling.

Dd has tried t like her but she is getting so fed up with the constant attempts of X to be her partner, be her "best friend" (dd doesn't and never has wanted one best friend) and to try and turn her against others in the group.
She doesn't like confrontation, but it steaming by the time she gets home.

Any ideas how to deal with it. She wouldn't tell her to F* off I know although she does say "X don't be mean to Y" or "well they're my friend even if you don't like them"

[nickschick]

I think sometimes you have to stand back and let them deal with it themselves.

Its kids stuff.

[SleighGirl]

how about dramatic eye roll and "get a life, we're all friends get used to it" not in a nasty way but in that half joking half I'm not going to put up with it way? could she pull it off?

[posey]

Thanks.
Nickschick, probably wasn't being completely clear. Dd asked me how she should handle it, just some advice really and when I said I didn't really know she said, ask mumsnet!
Its not me asking how I should deal with it iyswim.
SleighGirl, yes that sounds something she could try, thank you.

[Slartybartfast]

dd, same year, has similar situation. weird. must be a power thing, hormones perhaps?
perhaps she shoudlnt take it seriously? tell her, you'll be best friends tomorrow, girls are mean. etc.,

[nickschick]

aww im sorry posey im a mean old cow .

Kids are bloody cruel to each other and girls even worse than boys.