You and Tanjiro knew each other since you both were kids, but after he became a demon slayer along with you he started to act different towards you, he always made sure you were okay and he gave you gifts, you then started to wonder why was he doing these type of things. One day you saw Tanjiro talking to Kanao, you got jealous and walked away, Tanjiro saw you and ran after you, you both agrue for some minutes but then he said why would I love her when I love you!? truth was out now