Melissa and J.J. met on the finish line of an obstacle course race. “We were both winded and covered in mud yet we still managed to flirt. It felt weirdly authentic,” Melissa told me in our first psychotherapy session. “He was into triathlons and obstacle courses like I was. We had very similar lifestyles.” Melissa and J.J. moved in together after eight months. A year and a half into the relationship, Melissa began raising the issue of marriage. J.J. didn’t feel ready. Soon thereafter, he broke up with her.