Michael let your heart guide you on this. You and your Dad got years of living ahead, work to make them good years if you can. Your words say it matters a lot.
I never told my Dad and it left me angry and bitter towards him. Like your Dad I blame him for things not done.
It also leave me second guessing do I get it right with my own kids. I think that's really my point, don't carry this forward and let it effect you in ways unseen.
Good luck. It's all about you Michael....
"You can get far in life by pushing except through a door marked PULL...." Profile quote in my son's senior year HS Yearbook.