Greg Behrendt and Liz Tuccillo co-wrote this relationship advice book after an incident in the writers' room of the television series
Sex and the City, where both worked. Structured as a series of thematic chapters addressing common dating scenarios, the book argues a single thesis: When a man is not pursuing a woman with clear, consistent effort, he is simply not interested in her, and no excuse changes that fact. A foreword to the expanded edition notes the book's unexpected popularity, an appearance on
The Oprah Winfrey Show that turned both authors into reluctant "relationship experts," and the flood of reader questions that prompted two bonus chapters.
The book opens with dual introductions recounting the same origin story. Liz, an executive story editor on
Sex and the City, describes a day in the writers' room when a female colleague sought advice about a man sending mixed signals. The staff concluded the man must be intimidated or scared. Greg, the show's straight-male consultant, told the woman plainly that the man was "just not that into you." The room was shocked, then intrigued. One by one, the writers shared their own confusing dating stories, and Greg dismantled every excuse, arguing that a sane man who genuinely likes a woman will let nothing stand in his way. Liz frames this as a liberating principle: Rather than spending hours dissecting mixed messages, women should assume rejection first and consider themselves the rule, not the exception. Greg reinforces this from a male perspective, positioning himself not as a therapist but as a regular guy willing to be honest. Men are not complicated, he insists. When a man is interested, he calls, shows up, and makes his intentions unmistakable.
A brief transitional section introduces the idea that women are all dating the same fictional man, a composite figure constructed from excuses: He is too busy, too stressed, too scarred, or not ready for commitment. Greg contends that genuinely unavailable men are so rare they qualify as urban legends, and he urges readers to value themselves highly, asserting that greater self-worth improves one's chances of finding real love.
The book's core consists of 11 chapters, each built around a specific behavior that signals disinterest. Every chapter follows the same format: Greg states a principle, illustrative letters from women present common excuses, Greg answers directly, and Liz contributes reflections on why each lesson is difficult to accept. Informal polls of male friends reinforce each chapter's point. A recurring letter-writer named Nikki reappears across multiple chapters defending the same boyfriend, a music video director. Greg's increasingly exasperated responses to Nikki track the man's predictable failures.
The first chapters address foundational dating behaviors. Chapter 1 argues that if a man is not asking a woman out, he is not interested, dismissing excuses about fear, intimidation, or forgetfulness. Greg maintains that men like to pursue, and a woman who must be the aggressor is almost certainly chasing someone uninterested. Chapter 2 asserts that a man who does not call simply is not thinking about the woman, equating "busy" with a refusal to prioritize the relationship. Chapter 3 distinguishes genuine dating from vague "hanging out," rejecting the idea that undefined arrangements or infrequent contact constitute real relationships. Chapter 4 addresses the absence of physical intimacy, arguing that when a man avoids a physical connection, he is not attracted, regardless of the excuses he offers.
The middle chapters tackle more serious breaches. Chapter 5 declares cheating an inexcusable betrayal, insisting that relationship problems should be addressed through conversation, never infidelity. Chapter 6 warns against mistaking drunken or substance-fueled encounters for genuine intimacy; Liz admits she has dated people with alcohol addiction, finding them spontaneous but ultimately unreliable. Chapter 7 tackles reluctance to marry, with Greg asserting that every man who claims he does not believe in marriage will eventually marry someone, just not the woman currently hearing this excuse.
Later chapters address the aftermath of failed relationships and more extreme situations. Chapter 8 argues that a breakup is definitive and that continued contact, breakup sex, and reconciliation cycles prevent women from moving forward. Greg distills two rules: Always be classy, never be unhinged. Chapter 9 covers men who vanish without explanation, stating that silence is itself a definitive answer. In a revealing moment, the chapter's "Greg, I Get It!" entry is written by Liz herself, who identifies as the woman from an earlier letter about a French man who stopped e-mailing, underscoring that Liz is simultaneously the book's coauthor and a subject of its advice. Chapter 10 addresses affairs with married or otherwise unavailable men, arguing that feelings for someone who cannot fully return them are functionally meaningless. Liz suspects her intense feelings for unavailable men existed precisely because the men could not be hers.
Chapter 11, the book's most emotionally raw chapter, argues that selfish, bullying, or extreme behavior is incompatible with love. Greg reframes the analysis around one question: Is he making you happy? Letters address partners who yell when stressed, publicly belittle a woman's intelligence, monitor her weight, or live off her income. Liz's commentary confesses she hates being alone and sometimes thinks a flawed partner is better than solitude. Unable to resolve the tension, she turns the argument over to Greg, who responds with the book's most earnest appeal, urging women to reject fear-based thinking and to believe that being with someone who makes them feel bad is worse than being alone.
A short chapter titled "Don't Listen to These Stories" warns against anecdotes about women who pursued reluctant men and found happiness, calling these rare exceptions. A practical chapter, "Now What Do You Do?," proposes that readers reset their standards by writing them down, and a glossary redefines common male phrases like "busy," "friend," and "I'm not ready" as variations of "I'm just not that into you." A Q&A chapter addresses lingering objections: Greg reaffirms that being alone is preferable to staying with someone out of fear, that most men who treat women badly do not change, and that the book is intended as a tool to be combined with good judgment, not a weapon.
In closing remarks, Greg explains his motivation: watching his sister and female friends endure bad relationships, and his own transformation after meeting his wife, Amiira, into someone who believes in "love the verb, not the noun" (162). Liz concedes that his absolute standards can feel impossible for a 41-year-old single woman, but admits he is right most of the time. She frames her remaining question as pragmatic: not which outlook is more realistic, but which will make her happier.
One of two bonus chapters for the expanded edition, "Life After He's Just Not That Into You," is written by Liz and outlines the emotional stages women experience after adopting the book's philosophy: exaltation as purging dead-end situations brings relief; loneliness when raised standards eliminate most available men; temptation in two forms, encountering a man with a convincing excuse and knowingly pursuing someone uninterested; and finally balance, which Liz compares to moderating a strict diet. She urges readers to end any situation that produces consistent misery and to return to the book's principles whenever they forget their worth. A final FAQ chapter addresses whether the book applies to marriage (Greg says it does), whether it blames women (Greg says it is written for women who already blame themselves too much), and closes with Greg affirming that all people, regardless of gender or orientation, deserve great relationships.