We have to say goodbye to somebody everyday.
Some people are so important in your life, and some are your dearest friends or families,
And even you've known that you could see each other again someday, and then we'd look foward to that moment silently.
But why we still feel so sad and grieved when we get departed?
Is it an ineluctable emotion for human being or sth.?
who can tell me?
And how can you say goodbye to your good friends when they must be off?