I Am Feeling Really Sad

I do not know why I'm very sad today. The heart is saying that you run away from this world.Can anyone here tell me why there is so much trouble in our lives and so much pain? Because I am no longer able to bear anymore.Now my courage is breaking. I want to go home. I have to fall asleep in my mother's dock.I am very sad today. Today I am also missing my sister. 😥