Argentine writer Borges once said that excessive hope has naturally caused extreme disappointment.
This means that when we don't care about one person, when we don't care, we don't have much disappointment.
Because in this world, people who can control your emotions are always the ones you really care about. What can affect your mood is always what you really value.
When you care too much about one person, you will naturally value everything related to him, his emotions and feelings, his attitude and performance towards you, and you will even unconsciously magnify many times in your heart.
I have to learn to care about myself for the rest of my life.
Don't care too much about others and suffer yourself...