honestly, if they were sick and hurting, they aren't suffering anymore. really, that's the best way i can suggest looking at it. it's the quality of life argument. yeah, you love them but it gets to a certain point where you wanting them to hold on just so you don't have to end up losing them is hurtful and selfish. love the memory, but take solace in the fact that he isn't suffering and in a better place, wherever that may be. i'm sorry you had to lose your granpa bb. i'm dealing with the same stuff rn. my gpa was just diagnosed and it's hit our family pretty hard.