[Lisa]

Sorry this is so long! Please read if you have time!

Ok so basically in my group of friends (theres like 9 of us) I dont get on with this one girl.
Its not like we fell out over something we just clash and she really annoys me cos she lies all the time and then constantly tries to impress people by acting EXACTLY like them
like seriously she'll be saying how horrible a dress is then they'll walk in and be like 'oh I like that' and she goes all 'yeah I love it'
It sounds like really stupid little things but its like constant!
So anyway its always been like this but most of the time we can get by and are 'nice' to each other
Then we had this huge argument a while ago, I said everything I had to say to her, we made up and were friends again.
Since then I've stayed round her house and everything and I thought we were fine.
But then for our Duke of Edinburgh we (my friendship group)had to split into 2 groups and everyone else was like 'oh maybe we shouldnt put those 2 together' but they didnt want to ask us about it and it was all akward.
So anyway I emailed her saying that I would have no problem being in her group but if she didnt want to be in mine then I would understand and to let me know.
She never emailed be back but told all the others that she wouldnt be in my group.
Then she decided that she wouldnt agree to the groups unless she was with another of our friends etc
Basically the groups ended up revolving around her and Im in a group that Im not too happy with but if I said anything people would think it was just cos I dont get on with her.

Now shes doing a run for charity with some other friends and I asked if I could do it with her.
She hasnt emailed me back and I know she doesnt wasnt me to do it.

What annoys me is that she wont even tell me when she has a problem.
What shall I do?
I dont want to do things with her but we have the same friends so its hard to just tell her to p*ss off (which is what I feel like doing!)
Also Im worried in case our friends side with her cos she is like a totally different person around them
She can be nice sometimes and then I get on with her but then other times shes a right bitch and she just flips
It annoys me cos it causes a rift in our friendship group and its just really selfish of her

Is there anything I can do without loosing my other friends???