You sound like a very sweet person. All I can say is that what you tell him should not regard how it will make him feel (hurt, disappointed) or what he wants, only how you feel. Dont approach him about it only because you think he is wanting to talk about it, but when you are ready. Honestly it might be awkward and maybe even disappointing, but it will not always be that way. I say if you want to discuss it with him, by all means you should, but do not get hung up on how your father feels. The same applies to your mother. I wish I'd let myself open up more to my parents before I let their utter disgust close the door on our relationship. I kinda think that maybe they do too...