I have your same issue, I'm an introvert, and have always had a difficult time making friends. If you have a husband and a childhood friend, that's already more than I have. Any time I have come close to making a close friend, it turns out they're not the person I thought they were. It can be frightening to become close to people, because what happens when they ghost, which seems to be de rigeur for everyone these days. Honestly, the older you get, the less you're willing to put up with from other people, so we keep self-selecting down to a smaller and smaller group.