I'll get kind of personal here...
I realized that I liked guys sexually when I was about 13. I realized I had had crushes on boys before that but never realized exactly what it was. When the hormones kicked in, I realized...but for a long time I never had any feeling that it was wrong. Although I did know what my life would become if my fellow students at Junior High School in Iowa in 1972 learned, I hadn't associated the hate of gays with myself - I hadn't internalized it.
Later, I did internalize it, went into the closet, tried to change myself with religion.
What I noticed was, that before this, I would have fantasies, and of course masturbation, but "after the act" I would find myself thinking about the closeness, the warmth of being next to the guy I had just (mentally) had sex with. That was almost the best part. That was true when I began having real sex as well.
When I had internalized the hate for homosexuality and started trying to change myself, I did continue to have fantasies (of course!) but as soon as the ejaculation happened, that was the end of it - "he" was then out of my mind. And in my few real-life sexual experiences during that time, it was the same thing; after the sexual need was met, I felt no more connection.
I did fall in love with a woman during that time, but like you, I realilzed I had no sexual attraction to her. She was a wonderful person, and I really wished I did have sexual attraction. Heck, I could fall in love with her again probably. And I don't think falling in love with her was a symptom of hating myself - I don't think "gay/straight" in people is nearly as absolute as the labels make it seem.
It took a lot of self-examination to let go of that fear of being gay, fear of people knowing, and the conditioning from society, and enjoy closeness and an emotional connection with a man again. But it did happen.