Interesting about your shoulders Hops. That's something I do, to the point I've pre-booked monthly massages. There really is such a thing as being too different (sum total) to be able to be together. And it's not about empathy, or even basic values (although that contributes to the total). But in this case, that wasn't the real issue.
The real issue is he felt he was able to define, decide, shape just how you should be... to make the relationship work for him. Never quite grokked that you have an equal right to that, or even that you might want it. Doesn't matter, most of the time, if you both have different needs and wants. It's that understanding of "it takes two"... and neither one being more important (or in charge) than the other.
You accepted that he is who he is; and while you didn't really want to change him... you did your level best to explain why that was a problem for you, gently... and while the "data" got through to his brain, it never penetrated any deeper than that. Which is why you continued to get emails, and continued to stress out over the most recent "thing". That just increased your emotional awareness that maybe he wasn't the right one... and it wasn't going to be possible for you to make any more space to accommodate that about him.
IT SHOULDN'T BE THAT DIFFICULT. Really and truly. And when it is, at our age, it's better to throw that fish back... and try again. These guys can be great people in and of themselves, but that doesn't mean they're a good fit for you, me or Holly. Those guys are still out there. Looking for you - and maybe you'll find them first.
And I fully believe you should feel "anticipation" instead of "anxiety" over the next time you spend time with a guy. The anxiety is your early warning radar that you can't be what this guy wants, without selling yourself out. You shouldn't have to choose.
Amber's bottomline:
You should be comfortable and relaxed enough to spend time together in fuzzy pants & robe: without putting on a "public face", cleaning up the dishes, tidying the house and vacumning... and babbling out the stuff in your head without editing it first. Everything else is up for experimentation, exploration and negotiation. I guess this has evolved watching the course of your journey... listening to Holly's trials & tribs... and my own tentative steps in this direction.
It shouldn't take more than a few months to know if you can relax to that point with someone. That's the chemistry part that doesn't sit still to be analyzed or defined. LOL.