"There's not a lot of research on how to make higher quality friendships out of the ones you already have," she says. "I think what Jillian might say is that these friendly conversations you have with your barista, I don't think she's saying you can't have a good friend that comes out of it."
How do friendships change as we get older? Should you join a bowling league? And is Angela more important to Mike than Mike is to Angela?