"If you can't make a promise, don't make a promise."
"But at the beginning... You said yourself that you would not make me sad! I believed it... And then what? What I waited for was the abandonment of the person I loved! What qualifications do you have to say that I don't keep my promise?! You are obviously the one who doesn't keep the promise!"
"No matter how strong a person looks on the outside, no matter how lonely he or she is, he will... Be afraid of being let down!"
Purpose: Don't do anything that will make both parties regret and disappoint you.