Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
Tweet: #Sad I #missed #GDragon #tonight in #Seattle.Might be awhile before he's back, I hope everyone who attended the #concert had a #great #time!
This tweet contains emotions: 