Just a momentary thought...
... Life is actually boring...
"Behind every smile there is more sadness hidden, and these sadnesses are often difficult to heal."
"When a person always seems to be optimistic, he is actually the saddest person; it's just that he doesn't want others to feel sorry for him anymore, so he can only work hard to become stronger and optimistic, so that others think he has no worries."
When you have such people around you, please give them more care.