My daughter is 8 and has been having some trouble at school with another girl (A) who she has been close friends with since age 3/4.
it seems A wasn't happy about my daughter playing with another kid a few weeks ago and it all stems from there.
A said she was left out, my daughter said A hadn't asked to play with them and didn't know she was upset. I reminded her to be aware of friends being lonely and to look out for anyone by themselves etc, but I didn't believe she had intentionally done anything wrong.
Since then my daughter has asked A to play numerous times at break times and my daughter said she just says 'no' gives dirty looks and will not engage with her.
It was really upsetting my daughter so while I don't like to get involved in kids disagreements I decided to let their teacher know so she could keep a eye on the situation. She wasn't wanting to go to school or after school clubs because she was worried about how A would be with her.
Teacher agreed there is a situation between them and got them together for a chat, my daughter said it went good and she felt happy that things might go back to normal. She was excited to be friends again.
Less than a day later A is back to refusing to play, and told my daughter not to tell teachers about her upsetting her in future.
Teacher has asked my daughter if she would like to sit away from A in class and my daughter said yes she would like to be moved.
I'm at the end of my tether, it's causing her a lot of anxiety and upset.
I've told my daughter she deserves better and to leave A be and play with other friends. I told her she can't let once child's behaviour affect her to the point she doesn't want to go to school.
I tried to approach A's mum as I know her but she was quite blunt and said her daughter doesn't have to play with anyone she doesn't want to and seemed to be suggesting my daughter was the problem "because she left A out on the first place" so I won't be bothering her again in a hurry!
I don't really know what I'm asking really. I want to teach her to be more resilient and not be bothered by silly kids being unkind, but I know that's easier said than done when you are 8 it's the end of the world 
What would you do in this situation? Or how have you dealt with kids friendship problems?