If you haven't laid awake at night worrying about relationships, we are not the same. For most of my life, bedtime meant rumination. I'd agonize over a crush. I'd analyze work emails in my mind, ...

At the time, I thought codependency seemed like a dubious, unscientific concept that could be self-pathologizing. But then I read something on the website of Co-Dependents Anonymous, a 12-step program ...