My DS started a new school due to re-location in September. He is a lovely, sensitive, kind, sweet boy. biased not perfect by any means but a nice lad.
He seems to tic along at school, sometimes plays with this person or that person but mostly plays by himself.
He says he does'nt mind and that other children are mean to him.
I was walking past school last week and he was sitting on the bench looking very sad.
When I gently spoke to him about this, he sais he likes school, which he does but feels a bit left out because there have been a few parties recently and he hasn't been invited. Since starting he has only been to one party and invited twice back to people's houses, tbh this was because I am friendly with the mothers. 
I don't know what to do! I have asked had children over a number of times for tea but no return invites. I'm thinking I should make sure I give him the opportunity to have afriend over each week? And invite lots of the the mums over for a coffee? HELP.
I'm not even bothered about him being popular, just one good friend would be nice.