Unknown Anger

Sometimes I don't even know why I'm angry anymore.
I just sit there with a blank expression staring off into nowhere. People ask me what my problem is, all I do anymore is utter the words, "nothing." Trying to hide an unknown anger deep inside of me with a laugh or a smile. But that smile isn't always so real as it seems. It's only the peel on an orange. The ground breaking beneath my feet. The unknown thought hanging over my head. Like a constant raining cloud that follows my every move. When will this storm ever end?