No, you are not alone
I also have a pee hole fetish and I started at an early age too. I used to explore myself a lot when I was younger (touching it and opening it up to look inside).
As I grew older, I was intensely curious about girls and how they were different and a lot of my fantasies revolved about how I would look at them and watch how they peed and exploring each others bodies.
As I masturbated, I would pretend that a woman was looking at me, I would rub it, pinch it and open it up and watch as the semen squirted out.
As I got older and became sexually active, I would ask my partner if it was OK to look at her vagina, I loved spreading her lips to look inside, I never told her I really just wanted to look at her pee hole and generally explored her vagina. Like you, I would love to have a partner to share my fetish, but I was always afraid I might be consider wierd or perverted.
I have been reading Solo Touch for a very long time (since the old Proaxis days) and I have never read anything relating to pee hole fetish and I too used to think I was alone.