I think if he was interested he would have made a move to talk to you elsewhere. Men don’t hang around imo.
Maybe he values his job and career. Could be he doesn't want to bet his ability to keep a roof over his head and keep paying his mortgage and other bills on a bit of office banter.
This was a convo I had with my brother who's been dating a woman he works with. They messaged and chatted and he enjoyed it and fancied her but never asked her out or got too flirty because, as he said, "I bet there isn't a guy alive who hasn't been burned by taking flirting at face value."
Finally the woman got exasperated and said she didn't understand him and accused him of leading her on. When he explained why he didn't ask her out, because if he got it wrong, he'd end up fired or having a chat with HR and blackmark against him if she complained, she admitted that had never even crossed her mind.
And why should it? Here's some female privilege to OP: ask the guy out. Absolutely feck all consequences await if he says no. Even if he does complain, do you think your (probably all female because diversity doesn't apply to this profession) HR dept will take him seriously? Have away.
If he asks OP out and the feelings aren't reciprocated, or if it's some other guy in the company springing romantic interest in her that she wasn't aware of, and how to handle it, she could always post here again for advice.
Some of which would be shop him - get on the phone to HR NOW - and have that guy burned at the stake! The audacity!!
So, yeah, the guy
could be interested, but isn't sure OP isn't being anything more than friendly and isn't willing to risk becoming homeless over it if she isn't what with today's PC climate, or he isn't interested and if asked out will do one of two things:
1) Politely let her down and fob her off with some BS about being her superior and against company regulations.
2) As above and also pre-emptively report her to HR in case she goes bat shit and starts accusing him of all sorts out of spite. Not reporting her per se, doesn't want action against her, just covering his ass in case of future fall-out.
Welcome to 2021. We can't have it all the ways.