The single life, for many people, is not actually empty. It is loud. It is full of a particular kind of noise: the replay. You replay that conversation from two weeks ago to figure out what you said wrong. You scroll through someone's Instagram trying to understand why things ended. You lie awake recalculating whether a different version of you might have gotten a different outcome. Psychologists call this rumination - and Jennifer Taitz is clear about what it does: it will not help you, and it will make your days worse if you let it run unchecked. Here is the important distinction. Rumination is not reflection. Reflection is when you think something through, identify what you have learned, and act differently. Rumination is when you think something through, feel worse, and then think it through again. The same thoughts, the same conclusions, the same feelings - on repeat. Taitz also names a specific trap she calls "regretting the rock star." After a relationship ends, most of us do not mourn the person as they actually were. We mourn a polished, edited version of them. We remember the good moments and quietly forget the frustrations, the incompatibilities, the ways they fell short. Psychologists call this the halo effect - and it makes every loss feel more significant than it was. The antidote is not to think badly of people who did not work out for you. It is to see them clearly. Not as the best version of someone you could have had, but as the actual person - limitations, incompatibilities, and all. The good news: rumination is a habit, not a character trait. And habits can be changed. The first step is noticing when you are doing it - and choosing, deliberately, to redirect your attention to something happening right now.