I responded to a flyer on my college campus looking for new players for an upcoming D&D game. 5 years later I got married to the girl who posted that flyer. We're still playing with some of those same players today.
I used Roll20 matchmaking, guy in that group invited me to another game with their friend.
Been together 4 years and engaged, moved across country, also I isolated myself before so my entire friend group now is from my fiancee.
Original guy ghosted us all in a heartless way, but he'll forever be the one who introduced me to my new life.