If you play the powerchords i suggest using (atleast when transitioning from Verse to Refrain):

   F5         F5 *
E | -x---------x--------------- | 
B | -x---------x--------------- | 
G | -x-----~---10-------------- | 
D | -3---------10-------------- | 
A | -3---------8--------------- | 
E | -1---------x--------------- | 

Feel free to comment and improve the chords :)
 
Intro:

 F5 *     C5       G5
 Oh, oh Oh, oh oh
 F5 *     C5       G5
 Oh, oh Oh, oh oh

Verse:
C5
 4 in the morning and im sober walking through the rain,
C5
 it doesnt matter where Im going everywheres the same,
  F5 *                         F5 *
 cold dark room , Ive put myself into.

C5
 Here were a window to a world  that I could never know
C5
 and asked for every piece of me, and so i let you go,
  F5 *                          F5 *
 way to soon, now back to my cold dark room.

Refrain:

F5                        C5 
 If I could take it all back,
                      G5
 I could make it all right,
                    G5               F5
 you could be, the best part of my life,
                     C5
 I can tell you all night,
                 G5
 that I wanna be,
                G5
 the man im supposed to be, that

Chorus:

 F5 *       C5               G5             G5
 I wont lie, I waited a million hours just to say that,
 F5 *      C5           G5     G5
 I will die, if you leave me,
F5                 C5 
 and you are the way my heart beats,
G5                 G5
 and you are the words my tongue speaks,
     F5 *      C5           G5     G5
 and I will die, if you leave me.


 F5 *     C5       G5
 Oh, oh Oh, oh oh
 
Verse:
C5                            
 I know you heard a thousand words that took your breath away.
C5 
 a million melodies that never got the most to say,
F5 *                              F5 *
 what they mean, I promised you everything.

Refrain:

F5 *                       C5 
 If I could take it all back,
                      G5
 I could make it all right,
                    G5               F5 *
 you could be, the best part of my life,
                     C5
 I can tell you all night,
                 G5
 that I wanna be,
                G5
 the man im supposed to be, that

Chorus:

 F5 *       C5               G5             G5
 I wont lie, I waited a million hours just to say that,
 F5 *      C5           G5     G5
 I will die, if you leave me,
F5                 C5 
 and you are the way my heart beats,
G5                 G5
 and you are the words my tongue speaks,
     F5 *      C5           G5     G5
 and I will die, if you leave me.

Bridge:
F5 *                    C5
 this is me, when my world stops turning,
  G5                          G5
 heart stops, while I notice everything is falling apart,
F5 *                    C5
 this is me, when my lungs start burning
    G5                           G5           
 to say what I mean, when I know that I could, what I want
F5 *                          C5
 tell me things that will break the silence,
G5                       G5
 when I can hear every heartbeat in this place,
F5 *                    C5
 I wanna see the hope, I wanna feel the love,
G5                      G5
 I wanna hear what you say, when I say

Chorus:

 F5 *       C5               G5             G5
 I wont lie, I waited a million hours just to say that,
 F5 *      C5           G5     G5
 I will die, if you leave me,
F5                 C5 
 and you are the way my heart beats,
G5                 G5
 and you are the words my tongue speaks,
     F5 *      C5           G5     G5
 and I will die, if you leave me.