Your son sounds a bit like mine! He recently turned 10 and was diagnosed about 3 years ago. He was evaluated for autism but didn't fit all the criteria. His Kindergarten teacher was the one who alerted us to the fact that he wasn't really interacting with the other kids. The school social worker was brought in to model behavior for him, and then we went from there. I've been lucky that his school has been wonderful about providing every service they think will help. We did OT when he was first diagnosed but now he's just in a social skills group at school as well as one at a psychologists' office that specializes in SPD and autism spectrum.