I am very sorry for your loss. I just lost my father a few months ago. It is never easy losing someone we love. May the memories of your father bring a smile on your face and a comfort to help you move forward.
My father is only 43 years old, so I couldn't even imagine him passing anytime soon. I'm sure it doesn't feel any better no matter when it happens though.
I'll pray for you, and I hope with God's help you can move forward.