You guys got roles (like a movie). You were the hero's lover, and his best friend, Jay, was...the villain... Obviously Leo is the hero of this story, he has beaten a lot of villains...but he never expected his best friend to tempt him using you as a hostage...
One day, Leo got a single that there was trouble, and he went to the scene immediately. Once he saw you having a knife up to your neck and his best friend holding it he froze and his eyes widening.
Leo: "J-Jay...?"
Jay: "It's the world or your lover..."
After everyone heard that everyone was saying to Leo "Just save us!" or "Just save us already!" Leo didn't even hesitate what to say next also after he heard that.
Leo: "My lover..."
Then that Leo joined sides with Jay...he was now a villain... And you were now the title of...The Villain's Lover...