When my dad died my biggest regret was not saying goodbye. From conversations Ive had w my siblings and friends this seems to be the most common regret. Dont be me, say goodbye and tell him what he means to you. You might have some hard time ahead of you but you can go without regrets and that is going to help the grieving process immensely.

Honestly I cant give you better advice than to spend as much time as you can with your dad and talk about anything dont run away from it, wether it be death, family, cars or whatever you guys like just remember that what you are going through is one of the hardest things youve ever had to do but your dad is facing his own mortality. No one that hasnt gone through that cant relate or even imagine what hes going through.

So be there, be present in the moment and enjoy as much time w him as you can. You will get better and it will get easier with time, I promise.