is a type of (narrower)
the experiencing of affective and emotional states
"she had a feeling of euphoria"; "he had terrible feelings of guilt"; "I disliked him and the feeling was mutual"
is an attribute of
enjoying or showing or marked by joy or pleasure
"a happy smile"; "spent many happy days on the beach"; "a happy marriage"
is an attribute of
experiencing or marked by or causing sadness or sorrow or discontent
"unhappy over her departure"; "unhappy with her raise"; "after the argument they lapsed into an unhappy silence"; "had an unhappy time at school"; "the unhappy (or sad) news"; "he looks so sad"