From the world's foremost neuroscientist of romantic love comes a personal story of connection and heartbreak that brings new understanding to an old truth: better to have loved and lost than never to have loved at all. At thirty-seven, Dr. Stephanie Cacioppo was content to be single. She was fulfilled by her work on the neuroscience of romantic love-how finding and growing with a partner literally reshapes our brains. That was, until she met the...