Basically this song is very simple
it's just the same thing repeated over and over
Here are all the chords used

 Em  B7  G  D  Am
-0---2---3--2--0--------------------------------------------------------
-0---0---3--3--1--------------------------------------------------------
-0---2---0--2--2--------------------------------------------------------
-2---1---0--0--2--------------------------------------------------------
-2---2---2-----0-------------------------------------------------------
-0---0---3------------------------------------------------------------


Em                                                  B7       
cold blows the wind over my true love cold blows the drops of rain 

Em                                            B7       Em      
I never had but one true love and in camville he was slain

     G       D      Am               G    Em        D 
I'll do as much for my true love as any young girl may

     Em                D                 Em            B7  
I'll sit and weep down by his grave for twelve months and one day 


And thats it just keep playing the same rhythm <-C.S.P..