I think go and have him tested. Their is a great book that explains aspergers...cvery basically to explain in to ppl....All cats have aspergers (its quite a funny book) there are some very very successful ppl with aspergers including bill gates.

Peopke with Aspergers can be very suceesfful and intelligent and very often are!! Just remember your son is your son he is who he is whether you have the diagnosis or not iykwim If he does have Aspergers and find out it will help you understnad some behaviours and help him also understand his thoughts and the way things make him feel!

Good luck!