Task: Analyze the tweet's emotional connotations 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 best portray the tweeter's mental state.
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