Melody:
What is a father, what is a son?
[personal experience] I have an excellent father, though he is emotionally muted. He taught us how to build fences, he made me love basketball, he taught me about cars and animals (an important role in choosing my career path), he stressed to us the importance of hard work and determination, about will in the face of adversity. He was like a quiet and powerful river running through our lives, and he still considers me to be his most level headed and responsible child. I made him a proud father, I will do what I can in my power to not take away his belief that he raised a great person - and that he bonded well with his (what he believed to be) son. He will call me his daughter after I transition, and I will not make a fuss if he never can without a bit of pain. My father is a good human being, and I do not hate the behaviors and lessons in life that I learned at his hand. [/personal experience]
The experience of fatherhood / boyhood does not have to be exclusive to those of the male gender. Women can do the things I listed above. Do what you can to grab onto the role of "father" to your son. Doing so does not make you less of a woman, children with transgendered parents are very lucky! If you do it right, he may become one of the most tolerable, level headed, accepting young men anyone has ever had the pleasure of encountering. Do it like a river: quietly, persistently, peacefully, powerfully.