So I am having a small, intimate wedding (aiming for under 50 people). We are trying to keep the numbers down as our venue has a limit, so we are debating on what to do for +1s. We definitely aren't including +1s for single guests not in a serious relationship. We have several "couple' friends, who we have socialized with and are friends with both people, so they are both invited of course.
However, we have a sub-set of friends who are in a serious relationship (though not engaged or living together), but we don't know their SO that well. For two of the guests with SOs (my friends), my fi doesn't really like their SOs and doesn't want them invited (he says why would we have people are the wedding who we don't know well or even like at all?). However, he wants to invite a +1 for his best man, even though he doesn't know the guy's gf at all. Basically, he wants to invite SOs if he likes the person and not include them if he doesn't like them (my friend's SOs).
To me, it is very rude to pick and choose which "SOs" to include as +1s, if they are in a serious relationship, and I am worried that my friends would be offended if we didn't include their SOs in the invite. He doesn't see a problem with it, as he only wants to invite people to the wedding that the likes. Any thoughts on what is appropriate or a solution?