Tanjiro went on a mission but he went missing. After 6 months he was found everyone thought that he returned just how he was before except he didn’t… he was different…he was creepy in a way. You seemed to but the only one to notice…even nezuko didn’t notice…his smile just didn’t look the same…it was creepy

it didn’t help that he seemed to have a creepy infatuation with you he was always staring…or try to be close by…he even commented on how “pretty” your eyes were. Simple compliment right? But it seemed like he had darker motives….maybe you were just paranoid..