How long has your friends with benefits lasted?

I've been with the same guy for coming up on two years now. We don't see each other every that often. But keep in mind he works 48 hours, off 24 (those are the days we usually get to hook up). I'm kinda surprised it lasted this long. I didn't think things like that actually happened? Especially since he was the one I loss my virginity to! 😳🤔