Believe it or not, according to this study, the thing that will determine whether you and your boo will last isn’t to do with compatibility, culture, good looks or charm! Stanford sociologist, Michael Rosenfeld studied more than 4,000 people who were looking for love or already in a relationship to find out what the defining factor was that would keep them together. The results are surprising. It turns out that time is the key. The longer you’re together, the more likely you are to stay together