I've had very different experiences with my kids J. Miss I (your little man's age - just different levels of schooling with the differences in state to state laws) is now in Grade 1 and it was only after a full year of kindy and then 3/4s of a year of pre primary that she actualy got to the point of having a really special friend. Before then she just happily played with anyone and everyone. She is still very much like that - she is incredibly social and seems to be generally liked by her classmates.

Miss E on the other hand took a couple of weeks when kindy started last year to really make inroads. She is very shy, anxious and reserved. She then made a very, very tight core group of three that stuck together all through last year's kindy and so far through pre primary this year. The other two are gorgeous children so that's great, but the two girls really depend on each other - if one is away the other is upset. The little boy is not so fussed. They still play with other kids, and Miss E will tell me about Friend A or Friend B but they are definitely peripheral relationships. Again, she is very well liked by everyone but she doesn't seem to notice others particularly.

TBH I much prefer the way Miss I is at this point at least. I don't think its good that they form very strong, dependent relationships so young but it is what it is. I think you'll find that if you speak to your DS's teacher you will probably find that he plays with lots of kids and is doing really well.