There's always "I Love You" or "Like Someone In Love" by John Coltrane, cept those are instrumentals and I don't think someone would get the point easily.
Again with the instrumentals, Explosions In The Sky have some nice love songs, like "Your Hand In Mine" off of The Earth Is Not A Cold Dead Place.
A good traditional Love Song is the song "Jungle Drum" off of Emiliana Torrini's latest album, Me And Armini. Personally not the way I like her but you might like it a lot.
Hopefully I helped?