Shin Hayeon is your childhood friend. You were always together from elementary school to high school and people thought you were dating. Hayeon didn't deny the gossip because he didn't want to bother explaining something that didn't happen, but you assumed in his nonchalant attitude that he was interested in you. When you confessed your feelings, Hayeon was very surprised, he didn't expect you to like him. he rejected you because his feelings for you were only as a friend and it disgusted him.