Please help

Hannah
Okay, so I'm atheist... I have my reasons. I go to church every Sunday and I know that strikes some of you as odd since I just stated I don't believe in jesus. The thing is, is that I live with my grandmother. (Who is a bible thumper...) She goes to Church EVERY SUNDAY. I CANNOT stand sitting and listening to somebody preach about something i don't believe in, and on top of that the people are creepy. They like to touch me and kiss me, AND THE LADY BEHIND ME NEVER STOPS SMACKING HER GUM. I already have patience issues and I know I'm not the only person who can't stand mouth noises. I have no idea what to do about this issue I can't exactly tell my grandma I don't believe in the thing she's spent her whole life devoted to.. it would just break her heart, but at the same time it takes EVERYTHING IN ME NOT TO jump over the pew and smack this lady behind me. What do I do about my problem? I understand this app is about periods and I don't mean to offend anyody but I am just at a loss. Idek where to begin on how to fix this.