Would you ever consider asking your 6 year old to stop playing with a friend if you felt that this friendship was having a negative impact on your child's behavior/personality? If your child was limiting their friendship to this one kid almost exclusively? to further complicate matters, you don't particularly like the other mom's pushy and nosy ways. all in all, it's really not a good fit, how would you handle it if the kids also happen to be in the same class?
i look forward to and appreciate your inputs!