Another worrying parent here. I have double the worry as I have a very shy 16 yo ds who has long standing school friends, but rarely sees them outside school, and often it is just one person who comes round and will play wargames with ds. Ds spends all his time either on the computer or wargaming. He has 2 months free ahead of him, and I can't see him getting out or doing anything apart from the gaming. It is heart-rending.
Then I have 12 yo dd who is coming to the end of her first year of secondary and still has not made any friends, despite desperately wanting to. I have no idea why she can't find a best friend. I know I am her mother and would say this, but she is delightful, full of fun, clever but not swotty, talented, but she has been without a special friend for nearly 3 years now.
It breaks my heart seeing or hearing about others kids with their hectic social lives. Dd would love that. Ds is not so bothered, but I feel he needs some social interaction as I worry about him being a reclusive weirdo when he is an adult.
That said, I have 2 other boys, one 9 and one 14 and, although they have lots of friends, neither of them see their friends outside school. On the one hand, I feel proud that my children all enjoy spending time with each other, but on the other hand, I worry that I have made them too tight a unit and something in them pushes potential friends away from them. 