Unrequited ( /ˌənriˈkwītid/) adj. (of a feeling, esp. love) Not returned or rewarded.
Because we’ve all fallen for someone who didn’t catch us.
Edge of Desire,John Mayer | Young and Beautiful, Lana Del Rey | Calendar Girl, Stars | Your Ex-Lover is Dead, Stars | Almost Lover, A Fine Frenzy | Skinny Love, Bon Iver | Give Me Love,Ed Sheeran| I Can’t Make You Love Me (Cover), Bon Iver | A Drop in the Ocean,Ron Pope | White Flag, Dido | You’re Beautiful,James Blunt | Kiss the Rain, Yiruma
Edit: I added two more songs I forgot—Kiss the Rain by Yiruma and A Drop in the Ocean by Ron Pope.