Parallel friendships are proving that you don't need one giant friend group to have meaningful connections.

Sometimes, friendship is about helping just because your friend is in need and you care about their well-being. Social exchange theory would suggest that you'd be better off dropping someone who is ...

Many of us measure our friendships by depth or quantity: Do I have enough close friends? Are they texting me back? Do they like me? But having spent the last 15 years studying happiness, I've learned ...

One of the most important and yet least understood areas of psychology concerns the role of friends in our lives. In my own writing on adult development and aging, I have constantly felt frustrated ...