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: @_jamiebraidwood haha, horrific is all that needs to be said. Glad I'm away to Spain on Sat so missing game 🍹🍕🍺☉☉
0.569