Accounting for that feeling that he didn't quite belong to you. Some people enter this world with one foot in this world and one foot remains in the other .They never completely belong to this world or to the other world of spirit. This is because they usually will serve both worlds and become a go between for them together.Usually these people grow up to be very spiritual and have wisdom beyond the normal every day person. It is possible your son may be one of these. Time will tell. Looks like he has the potential for more .
Have a great day
Deborah Anna