This is no doubt not the first incarnation of this question, but I some people think the world has had enough of folkie love songs, but I look around me and I see it isn't so. Oh no.
I figure this will illicit the names of songs I have never heard, and that is pretty much the point.

What do you think the most poingant, aching, heart breaking folk love song to you have ever heard.

For me I go with Stan Rogers Forty Five Years
and for you?....
WFTD
Nick