Unrequited Love Is Love That Is Not ...

"Unrequited love is love that is not reciprocated, even though reciprocation is usually deeply desired. The beloved may not even be aware of this person’s deep feelings for them. This can lead to feelings such as depression, low self-esteem, anxiety, and rapid mood swings between depression and euphoria. Being such a universal feeling, it has naturally been a frequent subject in popular culture." [Wikipedia]