I'm so sorry for your loss, Toohotruk. But those words seem so shallow and ineffectual.
I lost my Dad in 1988 after a long, two year stint in hospital, where he had to be after a series of strokes paralyzed him and rendered him almost mute. I think he lived in a dream state for those two years (at least I fervently hope so) and when he slipped away it seemed to us like it was a blessing he didn't go on any longer, such was he a shadow of his former self.
I don't entirely think I came to terms with his death, actually. I have felt sad and I miss him, but I never cried at all, not even at the funeral. Just a kind of melancholic numbness and a feeling of having misplaced something very important and the loss of which impinged upon my daily consciousness without me realizing what it was. Which sounds like what you are going through now.
Many years later me and my wife (she never met him) took our new baby daughter to his graveside and put fresh flowers on it - then I introduced our lovely girl to him. It was a lovely Summer's day and I was with my family who I love more than life and the tears finally came.
Maybe it was just some grit in my eye.
I wish I could have been with him when he died. As others have said you will find great comfort that you were there. Don't rush the grieving or lack of it, it will come when it needs to. Be strong and I wish you all the very best.