L.U.
My best friend has a boy who is on the spectrum. She has worked so hard with him to get him to be a good friend and to learn how to share, be compassionate, and follow rules. He is now 11 and a GREAT little boy. But it took a lot of work on her part and a lot of patience on my and my kid's part.
I talked with my boys about how his behavior is harder for him to control, about how hard it is for him to sometimes be empathetic...and truth be told I didn't see her or her son for about a year when things were really bad.
But, I think it is important for this boy to be socialized with your son. And I think it's important for your son to socialize with him. Both kid's can learn something from each other.
It may be good for you to go with your son when he is playing at their house.
Compassion for people who are not like us is a brilliant thing to teach our kids.
L.