What should I do and why do they hate me so much?

My mother was sitting in the chair I usually like to sit in and she was eating and crunching on an ice cream cone for a long period of time and i know i shouldnt have done this so please don t get mad at me people but i gave her a dirty look but it wasn t just cause of the crunching its cuz she was sitting in the chair for so long that i really wanted to sit in. i didn t think she would notice me giving the look but she did and told my sister who was sitting next to me and my sister told me cop on eva! making people feel bad for eatin! you re in the wrong here! ok i know i shouldn t have done it but the way i ve been feeling over my sister and her for so many weeks is way worse than me just giving one look that i didn t even mean to give. i feel like killing myself somehow.