Behind

Behind eyes have been sadness, emptiness, loneliness and crying.

Behind smile has been sadness, and fake smile to
Hide how hurt you are or have been.

Behind a heart has been hurt, disappointed, loneliness and heartache. Because
every time you open your heart, you're only knife in the heart with a knife.

It's better to wall up your heart and keep people away from you.
Because people are so fake and so dirty