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: I'm way too busy and tired all the time to worry about my past and the things I should be regretting (but I never am).
This tweet contains emotions: 
anticipation, joy, optimism, sadness