Based on the given tweet, determine the level of sadness the author is experiencing. Choose from the following options: 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: Sometimes people leave you halfway through the wood. Do not let it grieve you, no one leaves for good. #youarenotalone #nooneisalone
0: no sadness can be inferred