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: @UltimateBoxer My heart because you left me for so long again\n\n*slight pout but it turned to a smile*\n\nheheh just kidding, no I'm fine-
0.581