It ended hours ago. You’re lying in bed, replaying it. Not because you want to — but because your brain keeps pulling you back, running the same loop, looking for something. An answer. A resolution. Some version of events where you finally feel okay about what happened. This is rumination. And if you’ve ever been...

You either nailed it, or you failed it. The friendship is perfect, or it’s over. You’re fully on top of things, or you’re a disaster. There’s no in-between — or at least, it rarely feels like there is. If that sounds familiar, you’re not alone. Black-and-white thinking — sometimes called all-or-nothing thinking — is one...