<human>: Ok, so I know reddit is imploding at the moment, but I hope this sub isn't suffering too much from it.

Anyway, to expand on my title, I met this guy John around a year ago at his job. My friend [23F] and I go there every so often and he noticed so we sparked up conversation and have been friends since then.

I've always had a thing for older guys and I've had kind of a crush on John for the last few months. We flirt playfully but we're both in relationships and because of our age difference, that's not something I want to explore.

John and I, along with my aforementioned friend and his friend [30M], have been hanging out occasionally all together, but John has recently asked if I'm free to hang out other times. Both of our schedules are packed so we never made a plan. I'm not sure if it's weird if just the two of us do something together, because the last time we were hanging out, our friends had wandered off and he ran into someone he knew. I overheard the guy he ran into ask if I was his girlfriend and it was kind of awkward.

My SO is totally ok with my friendship with John and they have met, but I've never met John's SO.

Is our age difference too far apart to have a normal friendship? Is it wrong that I have a crush on him and we kind of flirt, even though I don't want to act on those feelings? Are other people going to see us spending time alone together as odd?

Can you summarize the given text in a few sentences?
<bot>: Met a guy almost 20 years older than me, have a crush on him, but just want to be friends. Have only spent time together in a group setting, but making plans to spend time alone. Is it weird?