Love that is not reciprocated, even though reciprocation is desired.(noun)
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Use "unrequited love" in a sentence
"True friendship resting only on virtue (amicitia honesta) demands undeniably a love of benevolence, which seeks only the happiness and well-being of the friend, whereas the friendly exchange of benefits rests upon a utilitarian basis (amicitia utilis) or one of pleasure (amicitia delectabilis), which presupposes a selfish love; still the benevolent love of friendship must be mutual, because an unrequited love becomes merely one of silent admiration, which is not friendship by any means."