Task: Categorize the tweet's emotional expression, classifying it as either 'neutral or no emotion' or as one or more of the specified emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that reflect the tweeter's state of mind.
Tweet: [ @TheChicMystique ] — hurting badly and that he can't just leave him like that. Angry and heartless. ]\n\nI promise you that I'll be back, —
This tweet contains emotions: 
anger, sadness