Task: Determine the appropriate intensity class for the tweet, reflecting the level of emotion E experienced by the user. 0: no E can be inferred. 1: low amount of E can be inferred. 2: moderate amount of E can be inferred. 3: high amount of E can be inferred.
Tweet: I'm way too busy and tired all the time to worry about my past and the things I should be regretting (but I never am).
Emotion: fear
Intensity class: 