I thought three would be too young but Ds's best friend seems practise two behaviours. First he winds Ds up until he lashes out. Then the friend complains to teacher / mum / me. (This has been noticed by the teacher and other mum, not just me).
Second, he has started telling Ds that 'You're not my friend anymore'. Ds is quietly devastated and it really affects his mood and behaviour.
Then after a few days it's back to normal.
I am not sure what to do as they are so young. Plus it's not really the best friend's fault. I think he is an extremely intelligent boy and is feeling bad due to a situation at home. Making Ds feel bad makes him feel better, IYSWIM.
or maybe I am over-thinking it? Has anyone else had this?