Standard Tuning.
I'm not 100% certain about the chorus, but I think the chords work ok...

Verse. 
A             E
Oh place your hands 
      A    E
On my Heart
     D
Oh I do beleive it's beating
            E
At the same pulse as yours
We're two 
A          E
Atoms in a molecule
A          E
Inseprably combined
   D
Oh like a piece of rope 
            E
Made out of two pieces of vine

Pre Chorus.
D
Oh I feel the bond
                          A
Oh between your heart and mine
                            D
And it's the bond that won't break
                         A
With the displacement of time

Chorus. x2
A
Cos we're just
    B5              C#5  D5
Two Bodies with just one Heart
We're just
A   B             C#5      D5
One body that one day fell apart

Break. (Continue playing the chords from the chorus.)

Verse 2.
       A         E
Oh I'm only ever hoping
      A           E
I can be there for you
      D
Oh if Halloween and Christmas
E
Ever become confused
       A            E
I will seperate the demons
         A               E
From the gift-givers for you
        D
Oh I'll seperate the Angels 
         E
From the Scary Witches too

Pre chorus.
D
To protect the bond
                       A
That I feel between our hearts
                        D
Oh because bonds can wear down
                     A
From the moment they start

Chorus X3

Outro. (same chord sequence as in the chorus)