Depressed

My Endorphin level is falling at a tremendous rate. I just couldn't help it but to be moody. It just feel so disheartening at times, why couldn't i smile/laugh my heart out? Why?
My heart has reasons that reasons does not understand. 

Sometimes, we need a little tears to clear the mist in our eyes,

a little assurance to clear our doubts in our head,

a little hug to nurse our aching heart,

and a little rest to carry on moving forward.