Each Valentine’s Day, I start off feeling happy. My contentment grows as my husband and I put our five children to bed and we enjoy a quiet dinner in the kitchen. I’m still happy when we plop ourselves onto the sofa for an hour of television before bedtime. But then my mood changes and I can’t help thinking about divorce. I don’t mean for me. It’s the shows we watch. The romantic twists and miserable turns of the characters; their many heartbreaks and only occasional highs reflect a deeper truth about modern life.