I have the same problem, having been into folk music for a very long time. When we were much younger he did come along to clubs & concerts - that was probably young love, but he just does not enjoy them as much as I do. He has his own hobby which also leaves me alone a few nights a week, but then I'm happy in my own company.
I am lucky that he enjoys the social side & will often come along to festivals just for the fun of being with others, but then my partner is a highly gregarious person & will chat to others at the drop of a hat. Is it just a bit of shyness that makes him uncomfortable with strangers or does he just hate folky stuff? Not unusual there, as most of the world look at us as tho' we're decidedly strange

I am lucky as I have lots of female as well as male folkie friends, and usually find that if I want to go to a session or dance alone, I will have someone to keep company with.
Perhaps if there are any number of singles, or even couples that you see regularly, you could try cultivating friendships and going with a group, which may discourage the prowlers, as if you are in group partners are often swapped around for dancing, there are other females to take as partners, & no-one will no who belongs to who.


Good luck
Aggie