Dave, I would like to know what you think about the nature of your grief in terms of regrets and guilt.
I have spent most of my 67 years trying to sort out grief, regret, and guilt.
I have decided that grief alone evolves from anguish to sweet sadness and acceptance.
But grief is almost always mixed with the other two. We wish we had said more, done more, been there to stop death, and so on.
Regrets to my mind are concrete 'things' we can pinpoint, hash out, define, and hopefully resolve.
Guilt on the other hand is an elusive poison! It tends to be vague (unless we are truly the one who brought on the death, such as by murder or driving drunk).
Dave, you didn't get to show your dad that you were not going to be the callow youth any longer, that you were even becoming much like him, that you were grateful for who he was, that you truly loved him? If true, that strikes me as a regret that can become something sweet, because you are fulfilling what you wanted to show him. No guilt. Am I far off?