Talking about comforting his disability

No need for comfort. Disabled students have strong psychology. What they need is that you treat them sincerely as your friends.

You just need to treat him as a friend. He can feel it. If you always think he is disabled.

You can never comfort him. On the contrary, he will find that you care about the idea that he is disabled.

Treat him with a normal heart. Treat him as an ordinary friend, and I don't need to teach you how to do it!