1 ) Unrequited love or one - sided love is love that is not openly reciprocated or understood as such by the beloved. The beloved may not be aware of the admirer's deep and strong romantic affection, or may consciously reject it
Wikipedia@
2 ) There are times when we have strong romantic feelings toward someone, only to find out that they do not feel the same way about us. That is called unrequited love—love that is not returned or rewarded. It is a one - sided experience that can leave us feeling pain, grief, and shame
Verywellmind. com@
3 ) If you have unrequited love for someone, they do not love you
E. g. Did their past experiences of unrequited love cause them to feel anxious?
E. g. He fancied Sarah no end but it was unrequited love
Collins dictionary@