I never knew my biological father, as he and my mother divorced when I was 2 years old. My mother moved and married again, and my stepfather adopted me when I was 5 years old so he is my dad.
I met my birth father last year, and to be honest it is hard for both of us as A) He has a hard time dealing with the fact I am no longer 2 years old and B) I don't know him as my dad!
We are close, and I hope we move along from his rantings about my 'b1tch of a mother' but it is a hard slog..the other posters have given excellent advice ~ when you do meet, try to see her as she is, not as a child..and answer any questions she has as honestly as possible.
I wish you all the luck in the world x