My biggest “what could have been”

So, long story short(ish):

There’s this guy that I’ve known for almost 15 years, we have always been into each other: feelings, sexting, the whole thing. Looking back to it, it was almost like being in a LDR because for some unknown reason, we never met.

Until recently.

When we both are in messy situations: I’ve been married for 5 years, he has a daughter and lives with the mother although they have an undefined and messy relationship (or so I’ve been told).

During all this time, we have been in contact (we don’t live in the same country anymore- I moved out in order to marry)

Obviously our encounter brought out feelings from both sides and it really makes me wonder: what could have been?

Anyone else with a “what could have been”?