My lovely, once sociable ds keeps telling me he doesn't like boys and girls...not just the ones at his nursery but images of boys and girls on tv, kids at the park and even sometimes young children who dare to be on the same stretch of street as him 
He has even taken to telling me he doesn't now like his friend he has known since a baby, his cousin who is the same age and other children he has always enjoyed playing with in the past. It is always kids of a reasonably similar age.
When i ask him why, he has two stock reasons - 1, they make him sad, 2, they have hit him (not true in the majority of cases, although it has happened once or twice- he is also not an angel himself, so he's in no way blameless) he's a very emotionally charged little fella - very quick to cry although usually quite quick to get over it- but not when it's his friends.
When i ask him why his friends make him sad, he says often it's because they cry ( the aforementioned cousin cried when she shared a room with him a few months back).
I think possibly the real reason is because he has massive issues with sharing. I think he equates his hatred of sharing with the child he is having to share with. He used to be a hitter but is a huge amount better these days, although the terrible crying and complaining that now accompanies playdates is nearly as horrid.
I have a friend coming round later with her son who he has previously played well with but just this afternoon he has started saying he doesn't want him to come round and crying at the thought of it. This is literally the last child he liked and now he's saying he doesn't like them is worrying me.
Anyone got any tips/experiences?