Why he don't go spontaneous on adventure such as normal people?
He's perhaps scared.
For all the strange things in the world.
What a pity!
I don't know what's wrong with him.
He is always alone, sitting between 4 walls without a door.
To be social is nothing for him, understand not real conversations and the difference between real and fantasy.
Much noise. That hurts! Close the ears!
Don't accept changes in the programme.
He want always the same.
Than isn't a fit of temper.
He's otherwise minded.
Especially details in his interest.
With special assistance and advice, he grows, learns and does more.