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: It's amazing how something gets stuck in your head, and you can't shake a memory...  Sometimes, I miss people a lot.  Wish they knew.
This tweet contains emotions: 
joy, sadness