Am    C    Dm    Em  
e | ---0-----0----1-----0-----
B | ---1-----1----3-----0-----
G | ---0h2---0----2-----0-----  
D | ---0h2---2----0-----2-----  
A | ---0-----3----0-----2-----  
E | ---0----(3)---x-----0-----

Here's how they fit into the Verse and Chorus :

[VERSE]

A5           C5   A5          C5
  C'mon Billy,     Come to me
A5                    C5       D5   C5   D5 C5   A5
  You know I'm waiting,  I'll love you endlessly.
A5           C5  A5                   C5
  C'mon Billy,    you're the only one,
A5                          C5       D5  C5    D5 C5  A5
  Don't you think it's time now you met your on-ly son ?
A5          C5   A5                C5
  I remember      our lovers' play
A5                   C5     D5  C5  D5 C5   A5
  The corn was golden,  we lay in it for days
A5          C5   A5                   C5
  I remember      the things you said
A5               C5         D5 C5    D5 C5     D5
  My little Billy,    come to your lo-ver's bed

[CHORUS]
D5          A5
  Come home,  is my plea
E5                A5
  Your home now is  here with me
D5         A5
  Come home  to your son
E5
  Tomorrow might never come

[VERSE]

C'mon Billy, you look good to me

How many nights now your child inside ohh - v.unsure about this!

Don't forget me, I had your son

Damn thing went crazy, but I swear you're the only one

[INSTRUMENTAL] for rest of verse

Then just repeat :
A5                C5  A5          C5
  Come along Billy,    Come to Me

At? o final da m?sica.