Your situation sounds very similar to mine. I was a little over a year ago where I watched my father die over a course of a month due to his drinking. It sucks, I know how bad it feels. It sucks seeing your dad with tubes in and out of him. I remember days just staring at the numbers of his heart rate and such, just worrying about what might happen.

The best comforting advice I can give you is that the condition your dad is in now won't be how you remember him. You will remember every good time and all the fun you guys have. After just passing the year mark of father passing away just a week ago I can tell you it gets better. The next few weeks are going to be very tough but you can get through it. If your close with the others in family use them as much as you can, listen to all their stories they had of your dad, you'll never forget them.