Can long-term relationships do more harm than good? Where is the line between intimacy and codependence? And should we all try to be more like Mike’s parents? RESOURCES:"A Record-High Share of 40-Year-Olds in the U.S. Have Never Been Married," by Richard Fry (Pew Research Center, 2023)."Divorce Skyrocketing Among Aging Boomers," by Sharon Jayson (AARP, 2023)."Don’t Let Love Take Over Your Life," by Faith Hill (The Atlantic, 2023)."Marriage Provides Health Benefits – and Here’s Why," by Libby Richards, Melissa Franks, and Rosie Shrout (The Conversation, 2023)."The Benefits of Diversifying Your Social Portfolio," by Samantha Boardman (Psychology Today, 2023)."Satisfying Singlehood as a Function of Age and Cohort: Satisfaction With Being Single Increases With Age After Midlife," by Yoobin Park, Elizabeth Page-Gould, and Geoff MacDonald (Psychology and Aging, 2022)."Pathology in Relationships," by Susan C. South (Annual Review of Clinical Psychology, 2021)."Behind 'the Collateral Heartbreak' and Intense Devotion of the Reagans' Decades-Long Romance," by Virginia Chamlee (People, 2021)."U.S. Marriage Rate Plunges to Lowest Level on Record," by Janet Adamy (The Wall Street Journal, 2020)."The Suffocation Model: Why Marriage in America Is Becoming an All-or-Nothing Institution," by Eli J. Finkel, Elaine O. Cheung, Lydia F. Emery, Kathleen L. Carswell, and Grace M. Larson (Current Directions in Psychological Science, 2015).EXTRAS:"Are We Getting Lonelier?" by No Stupid Questions (2023)."The Facts Are In: Two Parents Are Better Than One," by Freakonomics Radio (2023).“Why Did You Marry That Person? (Replay),” by Freakonomics Radio (2023).“The Fracking Boom, a Baby Boom, and the Retreat From Marriage,” by Freakonomics Radio (2017).