So many good ones listed, but want to add:
"Follow You, Follow Me," Genesis
"Mad About You," Belinda Carlisle (sp?)
"That's All," by Rod Stewart (and most of his and Linda Ronstadt's Great American Songbook recordings ). Also, a love song, but not a romantic love song, Rod Stewart's "Forever Young," (a parent's love for his/her children)
Speaking of Linda Ronstadt: "Someone to Watch Over Me"
"I'll have to say I love you in a song," Jim Croce