Task: Classify the mental state of the tweeter based on the tweet, determining if it is 'neutral or no emotion' or characterized by any of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust).
Tweet: Trying to make a #better_world is #depressing when it's a #failure -__-
This tweet contains emotions: 
anger, pessimism, sadness