Hi, Unicornicopia. I'm so sorry for all these losses and for your dad's situation. Loss is hard. As I get older, I am experiencing more and more losses. It's so tough, as you indicate. I wish I could make you feel better.
The way I get by (in the last few years, I have lost a dog, my mother, my best friend, and many other people I have known and cared about) is by 1) knowing I will see them again one day. (I believe in eternal life), and 2) knowing they would want me to keep on going and to enjoy the life that I have. In fact, my mother had a message read at her funeral that said that--and I know that's how loved ones who have passed on feel about us.
So, please think about that. Although I still miss my dog and the other people who have passed on, I am going on with my life--getting a new dog and new friends. I hope you will know that life can still be good and enjoyable. Look for the good and be good to yourself. Okay, sweet one?