If you have unrequited love for someone, they do not love you.
[literary]
...his unrequited love for a married woman.
unrequited in British English
(ˌʌnrɪˈkwaɪtɪd)
adjective
(of love, affection, etc) not reciprocated or returned
Examples of 'unrequited' in a sentence
unrequited
Yet for an unlucky few, sport can be an unrequited love.
Times, Sunday Times (2016)
It is always painful to find that feelings of affection are unrequited.
Times, Sunday Times (2008)
This is love not only unrequited but undeclared.
Times, Sunday Times (2014)
Everyone remembers their first proper unrequited crush.
Times, Sunday Times (2008)
Perhaps unrequited love can be enjoyable -- better to have loved and lost and all that.
Claudia Hammond EMOTIONAL ROLLERCOASTER: A Journey Through the Science of Feelings (2005)
He focuses more on artists' insecurities and generational rivalry than on unrequited love.
Times, Sunday Times (2013)
Did loneliness, exhaustion and an unrequited love all prove too much for the young doctor?
Times, Sunday Times (2008)
In most cases this love goes unrequited, as we are constantly let down by the object of our desire.
Times, Sunday Times (2011)
These are put on show alongside her own recent and new pieces that deal with such shared themes as loneliness, longing and unrequited love.
Times, Sunday Times (2015)
What sets this team apart, meant their ardour has not gone unrequited, is their intelligence.
Times, Sunday Times (2016)
Avoid tenacious'extreme lovers' who thrive on difficult and unrequited affection.
Times, Sunday Times (2009)
Those whose love was unrequited suffered from more colds and sore throats and their immune systems showed signs of increased activity, implying attempts to fight off disease.
Claudia Hammond EMOTIONAL ROLLERCOASTER: A Journey Through the Science of Feelings (2005)