That's how they build rapport and trust. They learn all this in schooling. It isn't a friendship but being a rock who just sits there quietly, isn't very helpful either. So they usually at least try to be engaging. They do it with everyone, sadly.

It's the sad part of therapy but the part I remind myself constantly so I don't get sucked into the fantasy of it all

And it's harder for you because you are strongly attached. Thats the perk of lessening the distance/attachment, it's hard at first but it does get easier to deal with stuff like this.Ya this is a weird boundary but to be fair, he doesn't have many with you, so I guess I'd be happy with that. He's obviously not the type to share loads of stuff, so I guess just be aware and try not to ask much about it, stay focused on the things you need to work on.