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: not going to waste my energy holding a grudge against someone who wasnt even in my life a year XD \ntime to release those feelings of dislike
This tweet contains emotions: 
optimism