MWB you need to accept that you do like young girls. You don't have to like it, but at least accept it.
I know what you're going through. I'm a father of 3 girls and I have never imagined nor ever tried anything with them. I have no urge or desires to do that with my own flesh and blood. However, I have always fantasized of younger girls from ages 12-19. They had to be "developed" not look like little elementary kids.
This is a secret I have carried with me since my mid-twenties. Only one person knows of it... I slept with her when she was only 14 and I was 27. She was no angel and was sexually active well before I came into her life, her mother even let it happen. That was the only time I acted on those thoughts. I'm older now and I still have the fantasies, but now they're just that..."THOUGHTS" - no need to indulge in them again. It was an experience I had and I'm lucky I never went to jail or damaged the girl. We still keep in touch and she's living a great life as she enters her 30's.
I'm in no way advising you to act on your thoughts, you might not be as fortunate. I'm just letting you know that you are normal...however acting on the fantasies can put you in a world of hurt and anguish. Just enjoy the thoughts, but don't surf the net looking for it and don't keep photos, you risk being caught.
My daughters have very pretty friends, but I just enjoy the scenery and know that whatever fantasy is in my mind would be much better than any physical act I could do with their friends. Plus, it's much safer!