This is a very easy song to play, just keep your first finger (pointer finger) on the third fret of the second string, your second finger (middle finger) on the fourth fret of the third string, and your third finger (ring finger) or fourth finger (pinky), whichever one you're more comfortable with, on the fifth fret of the first string.

e---------5-------------5------
B---3---3---3---3-3---3---3---3
G-4---4-------4-----4-------4--
D------------------------------
A------------------------------
E------------------------------x2

e---------5-----------5---------------5-------------5------
B---3---3---3---3---3---3---3---3---3---3---3-3---3---3---3
G-4---4-------4---4-------4---4---4-------4-----4-------4--
D----------------------------------------------------------
A----------------------------------------------------------
E----------------------------------------------------------x3
Until the day I die.........

e---------5---------------5------
B---3---3---3---3---3---3---3---3
G-4---4-------4---4---4-------4--
D--------------------------------
A--------------------------------
E--------------------------------