Given the emotion joy and the tweet "You know you're in love when all you can do is smile whenever you talk about how he is to someone.", classify the intensity of the emotion displayed in the tweet. The classification options are: 0: no joy can be inferred, 1: low amount of joy can be inferred, 2: moderate amount of joy can be inferred, 3: high amount of joy can be inferred.
3: high amount of joy can be inferred