I never knew my birth father either. I was in the same situation as you are at about he same point in my life. I chose not to meet him. My thoughts were if he didn't care about me all these years...I didn't care to know him. I wasn't going to give him the satisfaction of even trying after all these years. He has since passed and I honestly don't regret my decision. Good luck with whatever decision you make. Only you can make the choice.