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: What do I do with my heart that is trembling by just the thought of it?\nI really don’t know what love is
This tweet contains emotions: 
love, sadness