I nearly picked God Only Knows, but it seemed an obvious choice around here

The greatest Hank Williams broken hearted song will always be 'I'm So Lonesome I Could Cry'. That song is devastating.
I Can't Help Falling In Love With You by Elvis is another all-time one. It's like a hymn. And the lyrics are perfect. You could not improve them.
"I'm so lonesome I could cry" is one of my faorite songs ever and there aren't many versions that did the song justice beside the original. I'm always waiting for the definite version. But probably that always will be Hanks'
I wouldn't consider it a love song, though. Of course you could interpret it that way but I think it's not about a social loneliness (love) but of a emotional (reclusion). Does that make sense ?
I like Elvis' studio recording of Can't Help... but I think the very best rendition he ever gave is on his "In person" album. There's so much emotion and soul. For some reason the studio cut hasn't this imo
Oh yeah. Forgot about that. Leiber & Stoller wrote it as a parody of country music and they more than once stated how astonished they were with what Elvis made with that song.
On Presley's 60s soundtracks are a lot of beautiful love ballads to be found. One of the best (written by the great Don Robertson) is "They remind me too much of you".
Hope this works for you guys:
http://www.youtube.com/watch?v=1EAfQ4SKQycThis is also a not very well known classic (It Hurts Me):
http://www.youtube.com/watch?v=TshL-YfSuIMAnd also Presley's rendition of the old country song "Have I told you lately that I love you?" is genius. And I won't even mention "Are you lonesome tonight" or "Love me tender". Thanks guys, I might gonna listen to my Presley love songs CD tonight