You are my air, the only strength I can live in this world. Once I lose you, my life will be dark, just like a person who is about to drown in the sea. After all his strength is used up, he can only sink quietly to the bottom of the sea. So I have to hold on to you tightly and don't want to leave you. But when I see you in pain, it hurts me ten times, maybe a hundred times more than you, so I can only let go. "I love you" are the three words you least believe in, but they are my truest heart. Being willing to let go is the happiness I owe you.