A ghost in the house by Alison Krauss – grieving
If Tomorrow never comes by Ronan Keating and also by Brenda Kinnear - The subject is in the title.
Sweet old world by Emmylou Harris – grieving.
Yesterday when I was young by Roy Clark, Dusty Springfield and others – regret.
Try to remember by Jerry Orbach - nostalgia.
If I Loved You by Shirley Jones and Gordon MacRae from the show Carousel (and we know how that turned out).