Your ONE all time favorite love song?

For me it's "The First Time Ever I Saw Your Face" by Roberta Flack, from her CD "Softly with These Songs, the Best of Roberta Flack", on Atlantic. I'm looking for LOVE SONGS. Thanks and Cheers. Craig
The Flying Burrito Bros. Hot Burrito #1 aka I'm your Toy.
You can hear Gram Parson's heart breaking as he sings.I have a couple more but you did say one...sigh.
how about joe tex (ca. 1965) : you got what it takes (to take what i got).

the cover by marti jones with don dixon (her husband) from the "my long haired life" album is great - my wife and i used this arrangement for our first dance.
Love songs also exist in personal context. When my wife was pregnant with our first child (a boy), we had our first quality system (Thiel, Hafler, Thorens). We danced and dreamed and cried over our happiness to Loggins & Messina Danny's Song. Man, that was a love song to us. Maybe I'm OP, but nice to recall that song, those feelings. He's now 22....