The most painful thing in the world is not that I love you but can't tell the other person, but that I didn't realize that I loved the other person until the other person was about to get married. At the moment when my life was lost, when I lost the person I loved most, I never had the chance to tell the other person. But I knew it too late, causing one to leave with regrets, and the other to live with regrets, but live like a puppet. His heart has already left and followed his beloved.