A source close to the couple insists there was no infidelity or other smoking gun behind their breakup, and says it was a mutual decision by two people who remain friends.
"It wasn't contentious," the source tells PEOPLE. "It had kind of just run its course ... They just sort of looked at each other and said, 'We like each other and we make each other laugh, but this isn't for the long-term.' "
THE spot for your favorite fan theories and the best Netflix recs. Learn more