Task: Determine the prevailing emotional tone of the tweet, categorizing it as either 'neutral or no emotion' or as one or more of the given emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that most accurately represent the tweeter's mental state.
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