LASS OF GLENSHEE
Do all those broken token ones count?
Three Tom Lehrer "love" songs: WHEN YOU ARE OLD AND GREY, I Hold Your Hand in Mine, THE WIENER SCHNITZEL WALTZ
BONNY YTHANSIDE
Those ones where she goes to war after him and they get married (MARY AND THE SOLDIER, Jackie Munro...)
In London So Fair
THE BANKS OF THE BANN

There must be lots more, but too much happiness is repetitive after a while (at least in a song).

Song title converted to link. --JoeClone, 19-Mar-02.