I work in a relatively small group - about 10 people. I work with one male who also has a long term relationship and children. We work in separate departments (see each other for about 30 mins of the work day in total). We rarely message outside of work (and if it is, it's about something to do with something IYKWIM).
I'm not sure why DP has been funny about this guy to start with. He doesn't know him. He's never met him. He knows his circumstances (has a family).
We had a work gathering a couple of months ago and afterwards, I got a lift home with said colleague. DP was in a mood for the rest of the night (but trying to say he wasn't bothered but the atmosphere was horrible).
We had a night out around the same time. I came home to tell DP some general stories of the night and he got clearly bothered when said colleague was mentioned.
We've now got another night out coming up this weekend. I've just relayed the list of who is going so far. He got really snappy and really bluntly asked, 'thought you said he doesn't even go out often???' (I'd mentioned that in passing when we'd gone for last night out). I asked him if he had a problem and he was snapped 'oh for fucks sake, no' and then went on to say about how it's just weird that he 'never goes out' but is coming out again. We sat there for 5 more minutes in complete awkwardness with a horrible tension and I said, 'what is your problem?' And he got really snappy and told me to just go away and that I try and make it out like he has a problem when he's fine.
AIBU? Should I leave it? I just hate the awkwardness when he's brought up (even though it's really not often). I like to come home and tell little stories of my day and he's all happy and loves hearing them, I just feel like I have to only talk about my female colleagues otherwise he's got a problem and doesn't want to hear it.