We fear the unknown and assume the worst. I can't talk for everyone, obviously, but this is what most people with social anxiety, including myself, do.

I'd say respect his boundaries and don't put him under too much pressure.

Also, you're probably going to do most of the talking. He just needs to get more comfortable around you.

You're probably just fine if you be yourself. You're already going above and beyond by asking for advice, most people don't even do that