Nina talks with neuroscientist and author Dr. Ben Rein about the brain science behind some of the most emotionally charged parts of adult friendship. They unpack why introverts still need connection, why ghosting and quiet quitting sting so sharply, how jealousy shows up between friends, and what’s actually happening when you instantly “click” with someone new. Dr. Rein also shares simple, evidence-based habits that make friendships healthier and more resilient—because when we understand how the brain works, we can navigate our relationships with more confidence, clarity, and compassion. Special thank you, as always, to my assistant producer, Rebekah Jacobs!