Yes, very much the same thing with me. I was born in the late 1950s, my earliest memories start around 1960 or so, and I don't ever remember a time when I wasn't fascinated with and attracted to diapers, plastic pants, and girls who wet themselves. In many other posts here I've told of my younger girl cousins and how one day--out of curiosity--I peeked into the diaper pail in the bathroom and instantly became addicted to the smell of wet diapers in the diaper pail.
Around the time I was in first grade, I went over to visit the girl next door who was my age and found her sitting on their porch in soaked shorts in a big puddle of pee. She said "I peed with my britches on!" and that she loved doing this. Even at the age of six I thought I was going to pass out from the excitement over seeing this. I left, thought about it, and decided to go ask her more. She wasn't at home but her wet pants / panties were on the porch and I stuck my face in them and again, about passed out. That's what led to my own experimenting with wetting. Then this guy in my class at school loaded his pants one day and this led to some early pooping experiences--until I was caught and got into all sorts of trouble.
My interest never went away, I continued experimenting and smelling diapers whenever possible, and this sort of expanded into smelling the panties of the other girls in the neighborhood when I was able (I know that's a controversial topic around here--but it's part of why I'm me, and I have no regrets). About the time I was going through puberty, I visited the kid across the street and he was giggling about how his older high school sister had wet the bed and gotten into all sorts of trouble. Long story short, I was able to get to the laundry room and found her soaked panties and took them home with me and I probably jerked off with them enough to cover a hockey rink.
Well, I hadn't really had any wetting fun for a few years and this led to me starting it again, and that's what led to me wearing diapers. And we're talking "towels and trash bags" here. That's pretty much when "the dam broke" with all of this stuff and from that point on, I've been totally hooked on diapers, wetting and all of the other related pleasures.
And to get back to the topic of the thread: YES, I thought that I HAD to be the ONLY person in the entire world who was into this, and that there was something terribly wrong with me. Either I was crazy or sick or whatever. And I felt horribly guilty over this. And this led to many years of doing the "binge and purge" thing. I'd get these insatiable desires to wear diapers, wet them, get off in them, toss them into a make-shift diaper pail, and keep getting them out and getting off in them again and again for days (and the more intense they smelled, the more I loved them). Then after a few days of getting it out of my system I'd swear that I was never going to do this again, that from now on I was going to be "normal" and I'd get rid of all diaper-related stuff. Until the next time.
Well this went on until I was 21 and finally old enough to start visiting porn shops, where I started buying "swinger's magazines" that had hundreds of ads in them, reading them all, looking for anyone who might also be into this. And in the back of one of those was a small advertisement for Amber Enterprises, which was called "Amber E" for short. The ad said "If wearing diapers and playing baby makes you happy, write us." I did and that's when I finally learned that yes, there were other people into this, and I must not be so crazy after all. It was a tremendously liberating thing and a turning point in my life.
Still the "binge and purge" persisted for about five more years, though I now knew I wasn't the only DL in the world, I still thought that I'd have to choose between my diapers and finding a woman and getting married. So the "binge and purge" took on a new form--I'd be happy enjoying my diapers, then I'd find a new girlfriend, then I'd think "OK time to be normal" and get rid of all my diapers and accessories and go steady with (and have sex with) the girl. Then we'd get into a big argument and / or break up and on the way home, there I'd be, stopping at the drug store to by diapers, pins, baby lotion and within an hour I'd be right back into my diapers again.
It wasn't until I was about 26 that I finally made peace with it and decided that "this is part of who I am and I'm not going to give it up, even if it means that I never get married." I resolved that any relationship I was in, if it got to a certain point of being serious, I'd tell her the truth (and fully expected that this would be the end of the relationship). Then, believe it or not, I found a girl who accepted me for who I am!
Anyway, yes, I think that all of us who grew up prior to the internet went through this, to some degree.