He's 12 Sprout. He has always had the same kind of report from teachers. Good boy but lacks confidence. He has no friends outside of school apart from the boys on xbox (primary school friends) and I think this shows when he's at school because he finds it hard to just get involved with the other boys.
He tells me everything is fine though and that he has plenty of friends and he honestly doesn't see what the teachers see
Try him in a drama class Ells.
I was going to suggest the same thing.
I was one of those quiet kids. Spent most of my time with my nose stuck in a book and really lacked confidence. I opted for drama classes rather than PE as soon as I could, and it helped my confidence a lot.