I think you're right Lulu - he is trying to make friends but he has no clue how to. He's a bit shy so maybe I should be looking on the bright side which is that at least he's trying lol.
He goes to cc once a week but he spends as much time as he can with Yasin not with the other children. He's with Yasin pretty much everywhere we go and he usually plays with him when we're visiting not other children.

I guess that for now I'll just try not to panic.