I think this is very accurate. I am a pianoplayer, and this fits perfectly with the song.
If you prefer, you could play the Bb instead of the Gm7.



F
Give me a second I 

I need to get my story straight
Dm7
My friends are in the bathroom

getting higher than the empire state
Gm7
my lover she's waiting for me

just across the bar
              Bb
My seats been taken by some sunglasses
C
asking 'bout a scar
F
and I know I gave it to you months ago
Dm7
I know you're trying to forget
Gm7
but between the drinks and subtle things

the holes in my apologies
Bb                              C
you know I'm trying hard to take it back


[Pre-chorus]
             Gm7       Am7
so if by the time the bar closes
        Dm    Am/C         Bb
and you feel like falling down
Bb             C
I'll carry you home 



[Chorus x2]

F
Tonight
F   Am/E  Dm 
We are young
                          Gm7
So let's set the world on fire

We can burn brighter 
         C (C7 or C6 optional)
than the sun



[The Same as the 1. verse]

Now I know that I'm not
all that you got
I guess that I
I just thought maybe we could find a ways to fall apart
But are friends in back
So let's raise a cup
Cause I found someone to carry me home 

[Chorus x2]

Tonight
We are young
So let's the set the world on fire
we can burn brighter
than the sun


F               Bb
Carry me home tonight
      F/A            C
Just carry me home tonight
F               Bb
Carry me home tonight
      F/A            C
Just carry me home tonight

The world is on my side
I have no reason to run
So will someone come and carry me home tonight
The angels never arrived
but I can hear the choir
so will someone come and carry me home 

Tonight
We are young
So let's set the world on fire
we can burn brighter
than the sun


[Same as pre-chorus on the 1. verse. Ending is a Fmajor.]

So if by the time the bar closes
and you feel like falling down
I'll carry you home tonight