In Buddhism, feelings (vedana) are not so much about emotions — but more about the feeling tone of pain or pleasure that accompanies a sensation.
One can be aware of three different feelings: pleasant, neutral, or painful.
Something interesting about neutral feelings: is a neutral feeling after a painful feeling feels pleasant, and a neutral feeling after a pleasant feeling feels painful.
Imagine there’s a scale where feelings are more pleasurable as they go up the scale and more painful as they go down. When a hit of pleasure wears off, anything that comes below that on the scale will feel unpleasant in comparison — even if it is a feeling one would normally classify as pleasant.