A new relationship—whether personal, romantic, or professional—is a lot like buying a new car. Driving it off the lot is pure bliss. As you look around, you can scarcely take it all in. Everything smells, sounds, and looks terrific. You coast through weeks or months—maybe even years— of happy driving before you’re aware of anything that needs fixing. And like a car, when a relationship breaks down, it’s overwhelming; you’re left stuck on the side of the road wondering what went wrong.