My sympathies, but rejoice in the fact that he lived a very long, and I'm sure happy, life. My father passed at the early age of 39 due to complications dealing with alcoholism, while I was only 11. Your father may have passed, but despite the loss, know that the two of you had what many, many others didn't.
That last part came out sounding wrong. Just know that you and your father had a long life together. All relationships come to an end. Try to consider the fact that yours was so long.
Again, my sympathies.