Who here's ex got involved in a rebound?

Hey how are you? Nothing I saw and I observed how my ex met someone else 15 days later and the week he was the love of his life, time has passed... 3 months I think and I don't see any signs of the boy, she doesn't show it off, she doesn't upload hints for him, plus the boy is still intense commenting on her photos that he uploads in stories, she uploads photos with her friends, they dance and a new group of friends. Sometimes some melancholic hint of emptiness hahaha I'm witnessing the fall, she's 71 backwards.

Did you experience something like this? I was his first love, his first in everything, during this time I learned many things!!