Hi all. Would like to get some feedback on the following as I'm not sure if I'm right in how I'm feeling.
One of my friends (let's call him A) of over a decade is having a birthday luncheon this weekend which I was invited to via fb. A is only having a small luncheon, less than 10 people are invited. My S/O is not friends with A on fb, though they have met once or twice before. I don't often see A as our work hours are very different (A does night shifts mainly whereas I work 730 til5) and are about 2 hours apart via public transport (A and I don't drive but my S/O does). Today I reached out to A and was queried as to if the invitation was able to be extended to my S/O as well. I felt it would be more than polite to ask rather than both of us turning up to lunch, S/O unexpected. A came back and said no, he is keeping it to "only people he knows". As of this I politely informed him that I will not be able to attend due to the 4 hour round trip via public transportation, but hoped he had a lovely luncheon and am hoping to organise meeting up for a drink or three at a bar in town with A, myself and a few others (my birthday is coming up). I had originally assumed S/O would be allowed to come and we would drive there (30 min trip in the car). A said that sounds lovely and is looking forward to the drinks.
I know this is a very small and trivial thing to be frustrated over but I am wondering what the big 'ol book of etiquette has to say about situations similar to this? I am feeling a bit hurt about this and confused. Would love peoples opinions/an outside perspective as I'm not sure if I'm in the wrong or not, and if I am would like to know so I can adjust my mind set.
Thank you in advance!