When my grandpa died in May, i cried a little at the funeral, but I wasn't that close to him in recent years because he moved away when I was like 8 and only came back once in a while until he stayed in my house for a few months last year.
When my grandma had brain surgery in 2012, I broke down sobbing in the hospital because I really thought she was going to die, but she made a full recovery and is doing great now
If she dies in my lifetime, I think i'll just kill myself tbh, because I can't imagine a world without her. There's no one on Earth I love more than her.