Oh, I certainly think it did blow him away when you predicted the birthday AND the sex! Although he may know you're intuitive, you're so right--this completely drove it home and he will be more respectful of your intuition in the future!
By sending him excerpts from your book, you're opening yourself up to him and I think he likes that. Nobody's childhood is perfect, and those that think so, are deluding themselves and purposely pushing the not so memorable memories from their minds. If he has not yet given you any indication of what he thought of the parts of the book you have shared with him, next time you're together in person, hint at the fact that it would be nice to hear his opinions and suggestions. If he seems reluctant to discuss it, drop it and don't push. He may feel awkward discussing it with you, but in time, it may become easier. Don't send him any more excerpts for the time being and it would be interesting to see if he asks you 'how is the book coming?'
I think he's all of the above, re: seeing you: nervous, excited and at times, wants to run the other way!
So much is going on in his life now, that he's going to have to put something on the back burner to make room/time to see you. Your patience in this, is crucial.