Hi Angeleyes,
I don't have a lot of time right now but I wanted to say it is very evident you love your son and all your children dearly.
You did the best you could and it doesn't sound like you've done too bad :O)

The only thing that popped out to me was Autism. There are many varying levels and from what I understand it has alot to do with being very brilliant but not having social skills or "everyday" skills.
Wish I had time to write but if you can get him in to a doc so he can be evaluated you may find some answers.
Wish you the best.
Heidu

The highest reward for a person's toil is not what they get for it, but what they become by it.
John Ruskin