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: There's many things I don't care about, and many things I do that I don't speak on because it's such a heaviness even when released...
This tweet contains emotions: 
fear, pessimism, sadness