If you want you can use C/B whether than G.

Verse 1
                  C G
Should never think
                  Am G
What's in your heart
                  F G
What's in our home
                  Am G
So I won't

(And it goes on like this. Just changes in this part):

G                  F
It's the one thing that I know
        G             Am
Once I put my coat on
      G                      F
And I know this is all wrong
                       G
She's standing outside holding me
      Am                    G  F
Saying  Oh please, I'm in love
        G
I'm in love

(Then it goes back to he same chords as the first verse)

Hope have done something good. ;D