Despite being the leader of BTS (or, perhaps, because he's the leader of the group), RM has rarely been publicly linked to anyone romantically. However, during a September 2017 interview with Billboard, RM spoke about the outro on BTS's album "Love Yourself," and his cryptic response led fans to believe that RM has (or had at the time) a secret lover for whom he wrote the verse.
As he told Billboard, "I thought it was the right outro for this album because it is really a range of emotions — I'm saying I met this person that I really love, this person is the love of my life right now." And though that person could be purely hypothetical, he did say that the verse came "from the bottom of my heart."
In recent months, RM has been spotted attending multiple events that his "Smoke Sprite" collaborator, So!Yoon!, was also attending (like G-Dragon's Nike party in April and BLACKPINK's Jennie's Calvin Klein pop-up event on May 10), which has sparked rumbles of speculation that they may be dating. Still, there's no indication that their relationship is anything more than friendly at the moment.