my girlfriend walked into a restaurant with another man and acted like she’d never met me. I was there with my friends when she passed our table, laughing at something he said. She glanced at me for half a second, then looked away. I thought I was imagining things until she went to the restroom and slipped a folded note into my jacket pocket. It read: “Whatever you do, don’t confront me. Just leave before he sees this.” I looked across the restaurant. The man beside her was no longer smiling. He was watching me. Then my phone buzzed. A message from my girlfriend: “If you love me, please don’t let him follow you home.”