I announced when I was 12 (apparently, I don't remember) that I was never going to be part of a "couple", that the whole concept was stupid. I put it a little more eloquently when I was 25 and carefully explained to my mother that I didn't understand the need for an SO, that I had my life my way, that I loved the things I did and never had to compromise, etc. She shook her head and said that I'd said that when I was 12 and she was hoping I'd "grow up". Oh well.

I'm 44 now and living with a wonderful man whom I adore, but not a day goes by that I don't have to remind myself that I adore him and I'm happy, that the old single days weren't as necessary to my happiness as I'd thought and to relax.

I met him on-line. I wonder if the statistics about the number of relationships that start on line on whatever TV add that is aren't true. But, it wasn't a dating site, it was a cycling site. I never noticed him particularly on-line but when I got a PM from Zyzzyx, I recognized that I'd seen posts by him/her. He said he was moving and I'd said something in one of my posts that made him think I might live in the area, and could I show him places to ride?
That was 4 years ago. We've been friends every since and "together" just over a year.
So, I think that's 3 of us who have answered that we've met our SOs on-line. But, not on dating sites.