I think it quite possible myself. he could have a very mild form of autism. I met a girl at camp last summer, we became best friends and still are. Now, I never realized it, but her mom was talking to mine and she found out my friend had autism. when my mother told me, I had no idea. I figure it's some form of Asperger's or PDD-NOS, but I'm not really sure. either way, she's still my friend.
OH, and if you look at what the signs of autism are, you might see it in him. I couldn't see it in my friend until I actualy took a good look at the facts. They're all on this website somewhere.
Hope this helps.