This is the tab submitted before by Catlikethief74 but with fixed chords. She was really 
the only difference really is the crescendo towards the end and the chorus afterwards.

Intro

A  Bm  G  D    x2

A                Bm
You look at me like you've been saved
G                 D
From another one that got away.
A                Bm
So I'm your latest cup of tea
G                D
To keep your cold hands company,
(here it becomes more picking, less strumming)
A            Bm
And I will warm you.
G           D
I will calm you down
A           Bm
Until those waters
G           D
Are ready to be sailed upon,
A        Bm         G    D
    Under a honeymoon.
A        Bm         G    D
    Under a honeymoon.

A                   Bm
You say you've never felt this way
G                  D
At least not this early.
A                Bm
We decide to hold nothing back -
G                 D
We'll act how we want to act.
A          Bm       G          D
And so, eventually, we became pretty good actors.
A          Bm        G         D
Acting and reacting and acting and reacting
A        Bm         G    D
    Under a honeymoon.
A        Bm         G    D
    Under a honeymoon.

F#m             G
We know the sun is gonna rise,
Bm             A
We tell ourselves to act surprised,
F#m              G
We're comforted in our denial
Bm               A
That dark love can be reconciled
(strum each chord once softly here)
A        Bm          G     D
Oh please, oh please, .... reconcile me
A           Bm
From all these bad actors,

All these bad endings.
(resume normal strumming)

Bm  F#m  G  Em
Bm  F#m  A  A

D        A         Bm    G
    Under a honeymoon.
D        A         Bm    G
    Under a honeymoon.
D                      A
We want what we're not and we don't want to stop
Bm                 F#m
'cause it feels right -
G                 Em
or at least it's feeling good,

A  A  A
A  Bm   G    D
....at least it feels good...
A  Bm   G    D

(strum each chord once softly for the end)
A                 Bm
I always fall in love too soon,
G                            D
Caught beneath the glow of a honeymoon