I Am Not Very Close With My Relatives

A few days ago my grandma called me for the first time since my dad died. I had always tried to call her but she neve picked up so i stopped. She still cant not talk to me or my siblings without crying or coming close to it. I was surprised she called but ever since my dad died his side of the famiky gets sooo emontiank when they call. The way the talk is so solemn as if my dads casket is always between us when we talk just on the phone.
I dont want to be sad about it anymore cause its been about 10yrs since he died and this may be cold hearted and rude but i dont want to cry with them when they call. I dont want to be sad about like they are. I can think about my dads death or all the times we spent together. I feel like whenever i talk to anyone on ny dads side of the family the theme of my dads death just hangs in the air.
It kinda ruins my mood.