Min Yoongi expected a lot of weird experiences to happen when he went to college, but being the roommate of his high school love who apparently "moved away for good" was not one of them.
Yoongi never imagined himself being in a relationship until he's questioned by an Interviewer about it. He then starts to wonder why the thought never occurred to him, up until now.
Which leads Yoongi to start questioning his love life and his role as a friend.