So you went on a first date with someone you met on Tinder. You made jokes and they laughed. You asked all the appropriate questions and listened attentively as they lit up talking about that job they love and that trip they’d always wanted to go on. It was a good night. But then they didn’t text you back, didn’t return your first, second, or third call. What went wrong?

You did all the things they tell you to do on a first date. You have a good job—even if you don’t always love it. And maybe y...