Sometimes until 11pm? Unless your industry keeps unusual hours, I would consider the fact that the way you think about this interaction might not be how he views it at all. Depends what you want to do about that really.
You say you don't find him attractive.....and.....so? Doesn't mean he doesn't find you attractive. You say that you've mentioned you have a husband....this may not bother him if he, and apparently unattractive guy, thinks he's in with a chance with a woman he finds attractive and he gets on with.
@CharSiu
However when I became single and again when DH and I had a rough patch it was amazing how some male friends suddenly declared feelings or changed the way they behaved towards me
You know, the women on this board often come across as incredibly naive. I would expect this with women in their 20s, or early 20 especially, but with grown women it still surprises me. It's basically the equivalent of a child covering their eyes during hide & seek, thinking that if they can't see you, then you must not be able to see them! Except, this time, it's grown women insisting that because they don't find their male friends attractive, and things are platonic on their part, then this MUST be what their male friends feel as well.
We've all heard of men who misjudge a situation where they think perfectly ordinary ordinary behaviour like smiling is sure sign that a woman fancies them. It's a type of wishful thinking projection. The same can happen the other way around where it's the women wants to think that something is platonic, when it's not quite that simple.
Not saying your friends definitely fancies you OP, and people can have mild crushes or think someone is quite without it being an issue, just presenting a different view.
@ComtesseDeSpair Make a delightful example of the defnesive knee jerk reaction that I've seen a few times, which basically goes 'BUT WHAT ABOUT BISEXUAL PEOPLE'. And???? If you are bisexual or gay, you are absolutely free to figure out what's best for you as you fit. Other people also have that right, and just because it's not in alignment with what you want, doesn't make it wrong.