Blue has had a series of loves; however, he has only dated two people—both memorable in their respective ways. Taesung was his first romantic partner, as well as his first same sex relationship of any sorts. Having met him on the night he was contracted as a trainee, Blue was at a club with friends celebrating when he caught the gaze of Taesung at the opposite corner. The two flirted throughout the whole night, and Blue remembers the night fondly till this day. Having dated for nine months, those months were decorated and adorned with a number of romantic evenings and intense emotions. Taesung is the first person he ever fell in love with and the first person to ever love him. He is also memorable because of how the two ended. A fatal and tragic breakup that still haunts him.
Chaeyeon was his second romantic partner and first girlfriend. Having always found her to be a pretty model printed in a number of magazines as well as a lovely figure on media, he was surprised when given the opportunity of meeting her. Having only been a trainee, it was about two years following his breakup with Taesung, yet it was only recent when he concluded that it would be best to move on, finally. At first, the two were only friends, and he grew to know her more personally, and found Chaeyeon to be more enduring—a gentle soul who deserved more. The two dated for a while, and he was happy with her. Their relationship was comfortable and a representation to any cinematic romance. Yet, when Blue debuted in 2016 with Unity, he ended their relationship in hope to focus more on his career as opposed to a relationship. However, the way he broke up with her was awful, for he told her—bitterly—that he no longer loved her, and he no longer wanted to spend time with her. He did to her what Taesung did to him.