Did i do something wrong ?

hey, long time no post , so how's life ? good ? okayy , we celebrated valentines day this morning , ya like you know , boys give girls chocolate, flower and stuffs , so when i opened the door of my class , all the students of 9a looked at me , idk why ? , and the lessons began , they kept watching me , i felt so weird , did i do something wrong or what ? then the break time started , everybody tried to ask me , * what's wrong with u ? why dont you talk or laugh like u used to ? are you sick ? should we take you to the UKS , or u got problem or something , and i said no , im good , what's wrong with you guys ? i only kept quiet for 9 hours then they said im sick , got problem and stuffs , to be honest im tired of being fussy .