When we're young, we don't have to work very hard to find other people. School surrounds us with friends. College gives us roommates. Workplaces become social circles. Marriage creates built-in companionship. Children fill the house with noise. Even running errands means constantly bumping into familiar faces. Life keeps putting people in front of us. Then, almost without noticing, it changes. The kids move away. Parents become elderly—or they're gone. Friends relocate, becom
