Given the tweet "@MHChat if we don't understand how to express our emotions to others, may lead to sadness / loneliness &amp; neg impact on long term mh #MHChat", identify any present emotions from this list: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If none are present, answer "neutral or no emotion".
pessimism, sadness