So What does it take to find true happiness as a couple? That’s the question that could help solve so many problems for so many couples! E-Harmony the dating site, just did a second national report on that very topic.. It’s called the happiness index.. So what makes a couple truely happy.. It shows 83 percent of americans are “happy” in their romantic relationships with a partner or spouse. Only one in nine people in a relationship are extremely or fairly unhappy. E-Harmony’s CEO explains more.