What must i call that...

Life is empty without "that" sometimes it make us feel but sometimes it can kill us slowly from our breath and our blood.

When you open your eyes in the morning, it make you smile like sunshine in summer, make you angry until make you wanna blow up, and sometimes make you sad until your tears like a waterfall. And the point is It make you crazy...

Are you know what is that?
What the best called for it....


^-????