Clawdy, try emailing Boom Radio (details are online.) They are brilliant at rooting out songs from lyrics and if they don't know it they ask their listeners if anyone remembers it! They nearly always come up trumps...
It's a pop song from the sixties or early seventies, and I can't remember who sang it! I've googled the lyrics and found nothing, it wasn't a big hit, I guess. Think it's called I Know. "I know Whatever I could do, I've done, Hoping to love you so no o-o-one Could say I haven't really tri-i- ied. I know I'll always love you til the end It's no use trying to pretend I'm still in love with you, I'm STILL in love with you I'm still in love with you......"