he nailed it
Jealousy … dictionary.com resentment against a rival, a person enjoying success or advantage, etc., or against another's success or advantage itself. mental uneasiness from suspicion or fear of rivalry, unfaithfulness, etc., as in love or aims. A zillion years ago - my main squeeze who once in a while was a true blue smarty on point pants told me jealousy is ... one person thinking the other person is having a better time.