Noun
The quality of being jealous; earnest concern or solicitude; painful apprehension of rivalship in cases nearly affecting one's happiness; painful suspicion of the faithfulness of husband, wife, or lover.
Source: Webster's dictionaryJealousy is the fear of comparison. Max Frisch
Jealousy is always born with love but does not always die with it. François de La Rochefoucauld
Moral indignation is jealousy with a halo. H. G. Wells
Love's merchandise is jealousy and broken faith. Italian Proverb
Love is too rare to be lost on jealousy. Mexican Proverb
Jealousy is a pain which eagerly seeks what causes pain. German Proverb