I'm not sure what's going on here or what to do for the best. It has potential to be a long story, I'll do my best to get to the point.
I have a very long established friendship with a man who I share an interest with. Decades ago we might have done something stupid (both married at the time) but we got past that and have remained friends without ever over stepping.
We see each other about twice a month, in the season, for an hour or two on our hobby. A handful of times a year we have a full day out at an event. Never meet up or even chat outside of these sessions.
This year for various reasons we haven't had a day out and the last opportunity for the season is coming up.
My newish BF is also interested in the hobby and has been to a few of the sessions. He's keen to come to more, but I've tried to consider friend and keep some of them just for us. Friend thinks BF likes to join us to check up on me. I honestly don't feel that at all, and I'm usually very conscious of potentially controlling men.
I also think my friend is possibly projecting and feeling some jealousy. I think BF genuinely enjoys the sessions and wants to make an effort to share a long standing interest of mine. I don't think it's occurred to him to be jealous of this married man.
On the day of our big day out, coincidentally, BF has a job near to where we'll be (SE, works all over the country). We usually go to the event then for drinks and dinner. BF has "offered" to join us for drinks when he finishes work.
I know my friend will think this is BF checking up on me, and maybe I'm being naive to think otherwise, but to me it does genuinely seem to be that he's excited for the opportunity to meet up in a fun social situation, to get to know my friend, who he likes, and to share our interest.
I haven't agreed and if I were to tell him I'd prefer to keep this event just me and friend, he might be disappointed, but he wouldn't be difficult about it.
I'm torn. I see friend's POV, I might not want him to bring a friend along, but also it would be nice to have BF join us, and in BF's shoes I might be disgruntled to be excluded. OTOH I probably wouldn't have invited myself!
WWYD?