My ds is q. sociable when he gets going but never actively picks up the phone to organise anything. He's 12 now but I still phone his mates' mums to invite them round, or to cinema etc.
If it was up to him he'd never see anyone outside school.
He does see village friends maybe once or twice a week, but rarely socialises with the kids at school, all of whom live between 4 and 10 miles away.
What are your lads like? do they go out round town on a Saturday with their friends? Invite them round for tea after school? Ever phone each other? (my ds does get phoned for gaming advice but that's it!)