Our kids "friends"

I am sure parents in here had to deal with that little friend your child had that you didn't like for so many possible reasons.

I am turning to you to share your experience and wise words.

Your child is preschool age and has a friend he or she can't stop talking, thinking and playing with. For some reason, you hate that little brat kid and you don't like the influence he or she does on your child nor how he or she threats your child.

How do you approach this situation, do you let your child know your feelings? How do you manage to get your child to see the true color of that kid?

Do you get Involve or let your child deal with it and let him find it by himself.....eventually?

Again, we are talking about kindergarten and first years of primary school.

Thanks,

Nil