"They moved in together into Luke's place in Nashville and it was cool at first, but they learned they just weren't compatible like that on a day to day basis," an insider told E! News at the time.
"They both realized that they didn't see this working out in the long term, so they quietly broke up."
"Holly knows this is the best for her," a second source had told E! News. "She realized he wasn't the person that she thought he was and that the person who he portrays on TV is not his authentic self."
Luke -- who has been the subject of public "player" and "cheater" accusations before -- told People that after The Bachelor Winter Games wrapped, he realized his heart really belonged to Holly the whole time, which was an explanation he attempted to use to justify why he gave Stassi the cold shoulder when she confronted him about his behavior on the reunion special.
Luke was also previously linked to former The Bachelor bachelorette Danielle Lombard in March 2017. He and Danielle, however, never got serious or became an item.