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: @alyssasimpson21 I gave up KENDRICK LAMAR to eat barbecue with him. #bitter
This tweet contains emotions: 
anger, anticipation, disgust, sadness