Parents naturally worry when their children don't fit the definition of normal or healthy that they would like, and, also naturally, they can't stop thinking this way.

Perhaps to put yourself in his shoes first would give you more insight in to how to help him - and indeed to see how he actually needs help. Sometimes others perceive suffering and problems where there are none, and don't perceive it when there is. Try to make sure you've got this the right way round, and much love and luck to you and your family.