Taylor Swift is telling me a story, and when Taylor Swift tells you a story, you listen, because you know it’s going to be good—not only because she’s had an extraordinary life, but because she’s an extraordinary storyteller. This one is about a time she got her heart broken, although not in the way you might expect. She was 17, she says, and she had booked the biggest opportunity of her life so far—a highly coveted slot opening for country superstar Kenny Chesney on tour. “This was going to change my career,” she remembers. “I was so excited.” But a...