Tricks: You can use a C for Cadd9 (makes it a little easier). But, Cadd9 sounds better to my ears.

Em Cadd9 G D Em Cadd9 G D C

Verse 1

G (320003@1)      Cadd9Got (x32030@1)a guitar
      G (320003@1)          Cadd9Got (x32030@1)a guitar on my back
        Em (022000@1)             D (xx0232@1)      Cadd9 (x32030@1)      G (320003@1)     Cadd9And (x32030@1)I'm standin' on this lonesome railroad track
          G (320003@1)      Cadd9Train's (x32030@1)a comin'
      G (320003@1)               Cadd9It'll (x32030@1)be here 'fore too long
      Em (022000@1)              D (xx0232@1)     Cadd9 (x32030@1)       GBut (320003@1)I don't think I can stop it with a song
            Am7 (x02010@1)       Cadd9 (x32030@1)     GGirl (320003@1)that's kind of the way I'm feelin'
Am7 (x02010@1)     Cadd9 (x32030@1)        
Tryin' to stop your leavin'

Verse 2

G (320003@1)      Cadd9Got (x32030@1)a pebble
      G (320003@1)          Cadd9Got (x32030@1)a pebble in my hand
      Em (022000@1)                 D (xx0232@1)           Cadd9 (x32030@1) G (320003@1)     Cadd9And (x32030@1)I toss it out into the middle of the Rio Grande
                    G (320003@1)      Cadd9But (x32030@1)the river keeps runnin'
           G (320003@1)             Cadd9Don't (x32030@1)even know that I'm around
        Em (022000@1)               D (xx0232@1)      Cadd9 (x32030@1)         GI (320003@1)could throw in a million more and not slow it down
            Am7 (x02010@1)       Cadd9 (x32030@1)     GGirl (320003@1)that's kind of the way I'm feelin'
Am7 (x02010@1)     Cadd9 (x32030@1)       Em (022000@1)       Cadd9Tryin' (x32030@1)to stop your leavin'

Bridge

G (320003@1)                  D (xx0232@1)           Em (022000@1)   Cadd9There's (x32030@1)nothin' that I wouldn't try
G (320003@1)                   D (xx0232@1)            Cadd9If (x32030@1)I thought it would change your mind

Verse 3 (palm mute or arpeggio)

G (320003@1)        Cadd9But (x32030@1)you don't love me
             G (320003@1)         Cadd9No (x32030@1)you don't love me anymore
      Em (022000@1)            D (xx0232@1)      Cadd9 (x32030@1)      GAnd (320003@1)I know as soon as you walk out that door
          G (320003@1)       Cadd9 (x32030@1)
Train's a comin'
        G (320003@1)         Cadd9 (x32030@1)   
river's runnin'
          G (320003@1)             Cadd9Train's (x32030@1)a comin', river's runnin'
         G (320003@1)               Cadd9Pain's (x32030@1)a comin', tears are runnin'
            Am7 (x02010@1)       Cadd9 (x32030@1)     GYeah (320003@1)that's kind of the way I'm feelin'
        Am7 (x02010@1)      Cadd9 (x32030@1)       Em (022000@1)     Cadd9 (x32030@1)G (320003@1)DKnowin' (xx0232@1)I couldn't stop your leavin'

Em Cadd9 G D (ending in G)