My dad is dying

My dad has a brain tumor, and it seems more likely that he’s going to die by the day. I hope he’ll be okay, but i feel like he won’t. I don’t want to lose my dad, and the thought makes me want to cry. Loss is probably one of the things i struggle with the most. I understand it’s a part of life, but it just hurts. I never dealt with it very well, especially when my grandpa died a few years back. It just fucking sucks, and i don’t know how i’ll deal with it if he actually does die because me worrying about him already has caused me to cry, and i’ll likely be devastated when he dies