Ask Amy: Social butterfly embraces the “plus one” concept

Dear Amy: My husband and I are in our mid-30s. We’re not introverts, but we are particular about the people with whom we spend our limited free time.
We have a reasonably large collection of carefully chosen friends about whom we care deeply.
One of our good friends is far more social than we are; she seems to meet a new close friend everywhere she goes. She is, as you might imagine, gregarious and fun to be around, but she has a habit that’s starting to get under our skin. Every tim