Task: Evaluate the tweet for emotional cues and classify 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 indicate the tweeter's state of mind.
Tweet: You know you're in love when all you can do is smile whenever you talk about how he is to someone.
This tweet contains emotions: 
joy, love, optimism