Yup, two guys.

One was almost 20 years ago and it's a long, complicated problem tied to my childhood trauma. Basically, I had a crush on the "perfect guy" (he was a genuinely good person and made me feel safe) and I used him as fantasy-fodder to mentally escape abuse. It was maladaptive daydreaming (which I think saved me, mentally, it protected my psyche from reality). But, because I fantasized so much and so hard, I haven't been able to forget him.

Second was a guy I briefly dated. He was lovely, but I ended the relationship. Sometimes I think about if I had kept it going. I wouldn't be unhappy with him, sometimes I think that I ended things because I'm broken. Anyways, he's married, but last time I talked to him, he wasn't happy in that relationship. We dated maybe 7 years ago, but we have been friends since then.