For the tweet "I can't afford to be unhappy. I've made it this far and there isn't anything or anyone that's going to take my happiness away.", determine the author's emotional state. Choose the correct classification from: 3: very positive emotional state can be inferred, 2: moderately positive emotional state can be inferred, 1: slightly positive emotional state can be inferred, 0: neutral or mixed emotional state can be inferred, -1: slightly negative emotional state can be inferred, -2: moderately negative emotional state can be inferred, -3: very negative emotional state can be inferred.