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: Some 'friends' get bitter when it seems your life is moving better than theirs.
This tweet contains emotions: 
disgust, pessimism, sadness