I am an enterprise software dev in the USA. Another developer recently joined my small team. While he and I do share some similar interests, I find him annoying and am not interested in spending time with him outside of work. My boss has hinted that I haven't "been a team player" outside of work, not given him "the [company] welcome", been too focused on work instead of team banter, etc.
He means that I don't really joke along with this guy. I will just listen to what he has to say and reply, "OK, well, let's get to the topic at hand", or something like that. Normally he is trying to be funny by tearing others down and I don't care to respond to that. But the "team player" stuff he alluded to would be things like playing video games together after work, bars, etc. Not workplace, whole-team stuff but i.e. "How about you try to find a video game to play together?"
I expect this will come up in my annual review next month.
How do I politely explain to my boss that while I don't mind working with the guy in a professional context, I'm not interested in being his friend?