My DD was 2 in March, she has a couple of friends we have known since birth who she will play quite happily (individually) with.
The problem arises when another child is introduced into the situation (either one she knows or one she doesn't), where she will withdraw totally from the situation, often going off to sit on a chair by herself and no longer wanting to play.
She is starting playgroup in September and I hope that this may help - although I'm worried it may not! She is an only (not sure if that's an issue or not, but thought I'd mention it!).
Any advice grateful received...