Lost my dad about 7 hours ago

I'm 24 but I have zero friends, my family has been pretty supportive but man my dad was my everything.

He was the only reason I would come down from my room to talk to him about literally anything.

Guy never judged or made me feel like shit even when I was being an asshole.

Stage 4 Pancreatic cancer turned the old man that carried this family even in his 60s, into being bed ridden, couldn't even talk, and was hardly conscious.

We couldn't help but stay with him and actually seeing someone's final breaths was insane, I even watched them put him in a body bag and take him away, because I just couldn't leave his side even after he was just a body.

How the hell have people gotten through this. My sisters all go back to their husbands/kids but it just feels like I'm actually alone now no matter how much they try to help.

Sorry for the rant I just can't even start step 1 which is falling asleep because I don't want to walk past his empty room.

Thanks for any replies.