for example at the park he always rushes straight over to children and literally shouts in their face, he won't politely ask their name or if he can play etc, just barges in.
i can see the other children looking at him slightly oddly then backing away. also notice it on the school playground.
he was shouting at the neighbours yesterday too, i was watching he just won't leave them alone and has no idea how to act socially.
any thoughts? it's worrying me slightly, he is 6