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: *Still waits for Yang. Guess she really needs her sleep or something. Kittens feeling kinda dejected right now.* #Offline
This tweet contains emotions: 
pessimism, sadness