I would like to know he's calling to really see how I'm doing, rather than have it be all business every time.

Perhaps that's what he's partly doing while under the guise of calling on business matters. Are you expecting him to word it a certain way, as in "So tell me, how's life? What are you up to nowadays?" He did ask how you were... that's an opening "bid" right there.

There is something I really don't get. If he's so sure he was unhappy here, why when we talk does he show me how miserable he still is? Why not at least try to put on a happy act? Isn't he just proving he's made a mistake?

Maybe. That's his journey for now, and if that's what he's experiencing, more power to him, do nothing to deter that journey for him. And if he's not putting on a "happy act" when talking to you, so much the better.

Here's a great suggestion for you, if I must say so. Now you go ahead and fashion for yourself a more active, interesting life. Go out and do stuff, get involved in new projects, follow your passions. Foremost, you do this for you and to live your life and fill it with wonderful things. When in contact with hubby, drop just a few crumbs of what you're up to. Maybe this coming weekend, if I get to meet up with all of you guys coming into NYC, I'll tell you about the "curious monkey and the shiny camp" theory, if you haven't heard about it yet, or if I don't bore you with it.

What I'm saying is, if he feels his life isn't going anywhere he expected, and you show some small glimpses of you living your life wonderfully without him (not too many details), he may start comparing his lot with "what could've been" with your life, (and by omitting lots of details and remaining vague) letting his imagination paint vivid pictures for him of what he's losing out on, and be drawn to where his lot in life seems better.