Wow, just came into this, sure struck a cord. Great advise from pr. I, like you, was seperated from my dad when I was very young. It is tough and no one can go through it without pain, and if you don't feel it now you will when you do decide to deal with it. It took me a longer time to deal with it than I wish had been the case, and I felt the same things that you are feeling for a long time, but in the end I forgave myself for all the imagined faults that I had thought I had, and then I was able to forgive the PAST for my father, with that I was able to begin a dialog with the man who would be a friend. My hope for you is that you do take a day or two to process all this and then maybe you might 'reach' back and just ask if you both can start over. It was just as hard for me to rekindle the relationship with my own daughter when it had been strained from divorce too. Gives unfortunately, a not so rare perspective, one of serial family breakups. It is strange to have this view from the child's as well as the parents's perspective, but I can tell you, this is very hard for a father too.
But, I must agree with pr, that you have a responsibility to yourself, take some time. He did fail. Doesn't mean he always will. He did reach out, it's up to you when you feel that you want to reach back. I wish you peace, and to that end I will now light-up my peace pipe. Mmmmm Bluberry.