| Em D | C#m  C D |.
First chords are Em, D and C#m. Each of them sounds for 2 beats (half of bar). Chords C and D are 1 beat long. 
The chorus part has following chord progression:
G B Am
Each of them is 2 bars long.
You can improvise using Em pentatonic scale .

Intro: ( Em D C#m C D )x6 G B Am

Verse:
      Em D C#m C D x2
I'll stay
     Em  D C#m   
I'll stay
     C     D   Em        D C#m
For she'll be coming back
C     D       Em              D   C#m
You know her head went out to play
 C      D  Em       D C#m C D
She'll get over that

Chorus:
   G
I know that my reward
            B 
When she returns
Woo-woo!
          Am
Keeps me hanging on

Verse:
      Em D C#m C D x2
I'll stay
      Em D C#m 
I'll stay
         C     D    Em     D C#m
Though friends they ridicule
 C   D       Em              D        C#m         
You know for her there is no substitute
 C   D  Em                    D
Talk I can endure (I must endure)
     C#m             C          D           
But that's alright, mother says "Son"

Chorus:
 G
Know my reward
            B
When she returns (whoo-whoo)
She'll still come home, whoaah
          Am
Keeps me hanging on

      Em D C#m C D x2
I'll stay

Solo: ( Em D C#m C D )x6 G B Am
      ( Em D C#m C D )x6 G B Am

Em
Ba ba-ba-ba              |
D                        |
Ba-ba-ba                 | x3
C#m    C       D         |
Ba-ba doo-whoo whoo-whoo | 

Outro: 
             Em        D   C#m
You know her head went out to play
 C         D
That's all right
Em       D       C#m       C  D
The girl will get over that
Em     D        C#m          C     D
Lord, my reward is gonna be much greater
Em      D    C#m        C     D
Every night, lord, is gonna replace her
Em          D            C#m          C       D
And if another girl decides she wants to go home
Em
Wait right there
D
Wait right here
C#m
Wait right here
C            D
I ain't goin' nowhere
Em
Wait right here
D
Wait right here
C#m
I'm gonna stand right here
     C             D
On this ground and wait
Em D C#m   C D
Hey hey hey hey.