Assess the level of the emotion sadness in the tweet provided. Use the following categories: 0: no sadness can be inferred, 1: low amount of sadness can be inferred, 2: moderate amount of sadness can be inferred, 3: high amount of sadness can be inferred.
Tweet: oh, btw - after a 6 month depression-free time I got a relapse now... superb #depression
3: high amount of sadness can be inferred