I lost my father in May after quite a long battle with cancer. It's rough. But it's life. I pray your friends can be more comforting than mine are. I wish I could help a man such as yourself. Take care.
Talk to him, stroke his face, tell him things you want to get off your chest. He'll sense it even if he isn't 100% aware. My grandmother died at the age of 103, she'd had dementia for ten+ years and hadn't recognized any of her children for five, and still she sighed with peace/relief at having her face cradled and gently stroked.
If you lose him I am very sorry for you but if it's any consolation, a bond like you have with a parent is so rich and formative that it will continue to develop long after he's gone. He might be dead for twenty years and then you'll still be remembering little details, or looking at certain things he told you in a new light because of new life experiences. Your dynamic and what position he holds to you is always going to grow on and nobody can take what he gave you away from you.
I try to think of death as the end of all pain, all suffering of any kind. Literally incapable of suffering anymore. His problems are over.
It's how I think of my mom since she's died of breast cancer. She suffered with untreated bipolar her whole life, and really struggled with it. She was in denial about it, didn't start getting treated til she was in her late 40s, and she died at 50. Attempted suicide in bipolar depression a couple times. Life was very hard for her, and now all that hardship is finally done.
It soothes my feelings about death a lot to think about it in that way.
sorry about your father. I always find that looking at funny pictures of very large dogs cheers me up.
give him a hug talk about anything play music that your dad likes tell him he was the best dad make the passes take a last picture with the give him a flower mourn a lot with the listen to your last wish try to listen to their laments tell him I'm sorry wait for him to recover but he does it, bury it in with the finest coffin Do not get depressed if you did everything on the list be happy knowing that you spent a good time with your dad one last time I wish you the best