Determine the valence intensity of the following tweet, considering the mental state of the author. Assign a real number between 0 and 1, where 0 denotes extremely negative and 1 denotes extremely positive.
Tweet: @ClvlndK8 It's so sad! There's always such optimism with a new year. This is...not good. @BuckshotBandit1 @dapostrophearcy
0.310