Friends are of course not made of glass, but many people always treat their friends as if they were glass, being extremely careful for fear that they might damage the friendship. Therefore, sometimes even when they are very dissatisfied with their friends, they do not dare to express it. They are afraid that once they express their dissatisfaction, there will be conflicts; once there are conflicts, feelings will be hurt; once feelings are hurt, they may lose this friend. Losing a friend over a trivial matter is not worth it, so they endure their friend's offenses and then secretly get angry inside.
A girl from university said that her good friend was really out of line. This friend, throughout four years in university, almost never fetched water herself, always letting her do it instead. Moreover, this friend often revealed secrets told by her in public. She hoped that one day this friend would realize that she shouldn't do such things. But this careless friend showed no signs of change at all.
"How do you deal with her behavior?"
"What can I do? I pretend not to care."
"So how does she know you're unhappy?"