Thank you all for your input and thoughts!
@Friday you're probably right that he knows. Though, I think, he usually attributes it to stress. But he did make a side comment a while ago about maybe truly something being "wrong" with me (when I mentioned that remark to T, she thought it was not nice, but I felt the complete opposite, namely that he doesn't think that I'm just being "difficult" - I really need to clear that up with T because I do think he meant it in a concerned kind of way, not derogatory; maybe it was a language barrier thing?)
I've been thinking about this some all day and it really comes down to this:
What do I expect him to do with that knowledge. What will it change?
Yes, it'll explain some of my behavior. But why does it feel like I'm just making excuses for being difficult? And, at least for now, it won't change my actual behavior, so it won't change the impact those behaviors have on him.
It'll show him that I'm truly trying to work on this, to get better. To change. To break free from this rat race that's been my past several years.
But beyond that? There's nothing on his part he can really do or help. As I mentioned, he has his own struggles, our life has its own struggles. I really don't want to burden him further than I already do (my anxiety, for example, is very exhausting for him as is, and it doesn't matter whether that has a label or explanation or not)
I guess at the end of the day it really comes down to me accepting my diagnoses, first. I'm fighting my own stigma.