Final answer:
Unrequited love is the term for love that is not reciprocated by the other party. It is associated with feelings of longing and rejection, differing from platonic love, companionate love, and agape.
Step-by-step explanation:
The term used to describe love that will never be returned is unrequited love. Unrequited love occurs when one person feels romantic love for another who does not return those feelings. It can be a source of profound emotions, from deep longing and desire to a sense of rejection and loneliness. Unrequited love is significantly different from other types of love such as platonic love (love without sexual desire, often found in friendships), companionate love (deep affection without sexual passion, found in some marriages and family relationships), and agape (a selfless, sacrificial, unconditional love). An example of unrequited love in literature is the character of Jay Gatsby for Daisy Buchanan in F. Scott Fitzgerald's 'The Great Gatsby', where Gatsby's deep and profound love for Daisy is not reciprocated in the same manner.