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: @RobertWesley3 I'm #mad that my brother is #sad ! Feel better bub!
This tweet contains emotions: 
anger, pessimism, sadness