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: I'm okay, dont worry. I wish i'd been a better kid. I'm trying to slow down. I'm sorry for letting you down.
This tweet contains emotions: 
fear, pessimism, sadness