You aren’t the only one feeling that way, just put yourself in a position to meet others. Start going to meetups of things that interest you, or, at the very least, engage with others on things that interest them and you’ll usually find common ground eventually. It can feel difficult and awkward, but everybody struggles with that when they first start to put themselves out there. Just persevere, you’ll find people.
I upgraded mine but haven’t talked to the wife about including her yet because the family plan is for up to 6 so it’d be cheaper to just buy two individual subscriptions, she doesn’t really care enough to justify that much extra cost. Hopefully Proton adds another plan or two for groups!