This is not an experience unique to us, as my 1st grader has previously gone through this. In the last couple of weeks my Kindergartner has expressed frustration that no one seems to want to play with him during recess. Here I usually ask for a little more detail. In the end I usually encourage him to keep being friendly, join in with the other kids, but to not stick with the same group of friends if they keep rejecting him.
Am I doing this right? What would you do in this situation? My 1st grader went through a similar stage all-year last year. When brought up to his teacher, they pretty said it wasn't completely true what my child has said. As a result, my interventions have been mostly reserved.