Bibbity - (once again) I'm sorry to hear about your Dad :(
When will you be able to go and see him? Can you stay a few days?
I think if he says anything about not having been a good Dad to you, you shouldn't disagree with him - don't lie about how you feel, not even now. Why not just acknowledge it to be the truth and thank him for realising that too, if you forgive him tell him so, but don't say it if you don't mean it.
Think about what you need to say to him or ask him - stay as long as you can, talk as much as you can.
I think no matter how old someone is you always want that bit (or a lot!) longer with them here - it's human nature.
x
PS: I hope you even up the balance with the Budgie xxx