Marry Your Best Friend is an essential guide to dating and relationships in the 2020s. It provides a roadmap covering the journey from dating to engagement to marriage or cohabitation, with an emphasis on building a loving friendship with a life partner, rather than solely focusing on romance and passion. It offers insights using real-life experiences (the author's and others), and statistical evidence gathered from a survey of 110 single and married individuals, to support its guidance on developing and building lasting, successful partnerships.