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: Am I the only person who dislikes fall? #FirstDayofFall #leaves #thingsdie #depressing #cold #noflipflops 👎🏾👎🏽👎🏻🍂🍁
0.250