I’m so sorry for your loss. It’s awful to lose a beloved parent, whether it’s quick and unexpected or a long, gradual decline. It’s awful, period.
My father had cholangiocarcinoma, a somewhat rare form of cancer that is rarely discovered before it’s terminal. In 7 weeks he went from being very physically active, with strength and stamina, to a nearly unrecognizable shriveled husk. We were traumatized by witnessing the transformation. People who hadn’t seen him since his diagnosis were completely shocked by his death. I spent the first year after his death in a fog, knowing that he was dead, but also feeling like I couldn’t believe it. He wasn’t ready to die at the time his cancer was found. At that point, he was still very busy, leading an active life, serving his community, and making plans for the future.
Your father’s death probably doesn’t feel real yet, and it may not for a while. The passage of time will very gradually dull your pain. You’ll always miss your dad and will continue to be sad that he’s passed, but over time, the waves of grief will lose some intensity and become less frequent. You will eventually have a memory of him that will make you laugh. You’ll be able to share a story about him without getting teary eyed. He may visit you in your dreams. He will continue to be an influential figure in your life.
Hugs to you.