For me, "the one" is currently married and living in Italy. He met his wife in the Army though she's like roughly a decade younger than him, but he joined late. Met this guy in high school in one of my classes and I instantly fell for him. We've hooked up in the past, walked around holding hands, and I even broke down in front of him this one time when I was drunk complaining about my aunt's treatment towards me. I also made a funny comment once how he should gain more muscle when he first joined the Army and what do you know, we video chatted while he was away and he was looking buff.
I mean, anyone would have confused us for a couple, but we never actually dated. I asked him once if he wanted to date, and he told me he wasn't looking for a relationship at the time. A mutual friend of ours swears otherwise, that back then he was trying to be in a relationship with me. I found that out recently, and honestly I was a bit confused. I've since moved on but it feels like me and "the one" weren't meant to be together, like the universe won't allow it.