Why did the theme song "Say Goodbye" of "Ex 3" make many people cry?

Mainly because the lyrics of this song are deeply rooted in people's hearts, "saying goodbye" is probably the fact that every couple breaks up. The relationship that I thought would last for a lifetime ended at a certain time and on a certain occasion, so two people became strangers, which was very sad.

Originally, the song "Say goodbye" won't cause too many people's sadness, but it is extremely sad when it is paired with "Goodbye My Ex". Few people cry on the way to the movies. Some people just sit there crying uncontrollably as soon as they sing the theme song after watching the movie.

I also understand these crying people. After all, I also have an ex, who has done untold harm to me. However, I think every predecessor is a textbook. He taught us to grow up and made us stronger and more harmless. I don't think my predecessor is worth remembering. After all, it's all over. There will be more beautiful things waiting for me in my future life. Why should I stop for the past?