When I was 19 I didn't talk to my dad for about two years. It was brought up in therapy at the time. Now I can be pretty stubborn and not want to back down. But at the end of the day, he is my father so I will eventually have to face the issue. So I wrote him a letter laying it all out there about how I felt. We talked and made up and I went to visit him when I was out in California not too long after. We've had our ups and downs since, and went through another no talking phase, but now we talk all the time. It really does take time to get through everything, but he is your father. I hope it all works out for you.