The song is standard tuning. 

In the key of B. I figured out these chords by ear.

Intro Ab5 x2

Ab5
Yes you've been on my mind,
F#5
I've been drifting for quite some time and,
C#5          B5
This life is paralyzing,
C#5          B5    F#5
This life is paralyzing,
Ab5
Me I can't see through the greys,
F#5
Truth has been lost in the haze and
C#5        B5        C#5        B5 F#5
I need someone to save me.

[Pre-Chorus]
Ab5         B5             F#5      E5
Truth's all I want, All I want is you,
Ab5        B5             F#5           Eb5
You're all I want, All I want, all I want,

[Chorus]

            Ab5
Cuz there's black and there's white,
            B5
and there's wrong and there's right,
        F#5                        E5                Eb5
I can't go one more night without telling you that I am sorry 
Ab5         B5
For all the pain I caused.
          F#5                       E5                Eb5
I've been gone for so long without telling you that I am sorry, 
Ab5              B5                F#5           E5           
Can you hear me? Please forgive me!

[Verse]
Ab5
I'm screaming through the noise, 
F#5
Tell me you can hear my voice, 
C#5     B5
I am so lost without you, 
C#5     B5        F#5      
I am so lost without you
Ab5                      F#5 
Here I need some clarity need your spirit leading me, 
C#5         B5           C#5        B5 F#5
my vision's getting blurry

[Pre-Chorus]

[Chorus]

[Bridge]
                         C#5         F#5
I've been locked in this maze for so long,
            Eb5           E5 
show me the way   back home,
        C#5     F#5    E5
Open my eyes to see you

[Instrumental] F#5 - Ab5 , B5 , Ab5 , F#5 , Ab5 , F#5 , Ab5 , B5
               Ab5 , B5 , Ab5 , F#5 , Ab5 , F#5 ,( Ab5 )..x2

Dada dada dada da
Dada dada dada da
.... dada dada da
dadada   dadadada

F#5  E5
Oh, Oh..
[Chorus]

[Pre-Chorus]

[Pre-Chorus]
Ab5         B5             F#5      E5
Truth's all I want, All I want is you,
Ab5        B5             F#5           E5
Truth's all I want, All I want, all I want,

[Chorus]


            Ab5
There's black and there's white,
            B5
and there's wrong and there's right,
        F#5                        E5                Eb5
I can't go one more night without telling you that I am sorry 
Ab5         B5
For all the pain I caused.
          F#5                       E5                Eb5
I've been gone for so long without telling you that I am sorry, 
Ab5              B5               F#5           E5           
Can you hear me? Please forgive me!


Ab5
Yes you've been on my mind,
F#5
I've been drifting for quite some time and,
C#5          B5
This life is paralyzing,
C#5          B5    F#5    Ab5
This life is paralyzing me,