I agree that you should leave them to it. Not sure how old your DD is given all the differences in school starting age, but my DD1 when she was in kindy so 4 turning 5 would come home saying that whoever didn't want to be her friend anymore, was friends with someone else etc. Initially it broke my heart and I wanted to go down there and say something because whether its kids being kids or not, its hurtful to say such things. I just told my DD that it wasn't a nice way to say it, but that sometimes people just want to play with other people sometimes and she could take the opportunity to maybe play with some new kids.

It also became pretty apparent that while my DD said she played "with no one", she was in fact quite a social little person and was always in the middle of things.

If your DD isn't overly upset about it, I would really just leave it be. If she is upset, then maybe talk to her teacher and ask her to keep an eye on things, and maybe help your DD join in a few groups.

Good luck. Its heart breaking to think that your little one is lonely or not liked