hey everybody, I consider myself a humanist atheist kind of deal i am 21 and i've never been too religious but i would say i made it "official" and started calling myself atheist at around 14. i go over my grandfathers house a good bit for diner. hes very religious (Russian Orthodox) he doesn't eat meat on Friday's and always wants everybody to say grace. now when i'm over friends houses i'm not shy. i tell them how i feel. in fact 90% of them already know, however my grandfather is 90 years old and has been religious all his life. I kind of just hold my hands and mumble along but i don't even really feel comfortable doing this. I don't want to break his heart or be rude but i can't be the only one eating or not participating in grace while everybody else is. any advice?