Chords:
     G   C   Dm  F   Am C9/B
e|---2---x---1---1---0---x---|
B|---2---1---3---1---1---1---|
G|---0---0---2---2---2---0---| 
D|---0---2---0---3---2---0---| 
A|---2---3---x---3---0---2---|
E|---3---x---x---1---x---x---| 
[Intro]
F Dm Am  x2
[Verse]
         F           Dm               Am           
I keep a close watch on this heart of mine
          F         Dm           Am
I keep my eyes wide open all the time
           F        Dm               Am
I keep the ends out for the tie that binds
               F    G           Am   
Because you're mine, I walk the line
[Verse]
          F          Dm         Am  
I find it very, very easy to be true
         F               Dm          Am  
I find myself alone when each day is through
            F        Dm             Am  
Yes, I'll admit that I'm a fool for you
https://www.coveralia.com/acordes/i-walk-the-line-halsey.php
               F    G           Am   
Because you're mine, I walk the line
               F    G           Am   
Because you're mine, I walk the line
[Chorus]
             Dm     F               Am     C9/B C
You've got a way to keep me on your side
             Dm       F                 Am     C9/B C
You give me cause for love that I can't hide
          Dm            F               Am     C9/B C
For you I know I'd even try to turn the tide
               Dm   F           Am     C9/B C
Because you're mine, I walk the line
               Dm   F           Am     C9/B C
Because you're mine, I walk the line
               Dm   F           Am     C9/B C
Because you're mine, I walk the line
[Outro]
               F    G           Am   
Because you're mine, I walk the line
               F    G           Am   
Because you're mine, I walk the line