This song is from the new Decade EP album and it's the hidden track.
I came up with these chords while listening to the song. 
I believe in the introduction you can either leave out the Bb 
or add it according to your preference. Sorry if this isn't
accurate. Also I said Eb5 because I feel like the original
Eb doesn't sound cohesive. 

Intro: Eb/Bb/Ab/Bb


Verse 1

Eb                      Bb(May or not be used)
Dear love, I'm honestly scared.
              Ab
Your voice is everywhere.
        Bb
Are you there?
Eb                     Bb
Oh, I am not ready for this.
                           Ab      Bb
There's so much about you, love, I miss.

Pre-chorus: 

Ab     Bb            Eb
Do you know that I'm lost?
         Ab     Bb         Eb5
And you left me here on my own.


Chorus: 

Eb         Bb         Ab      Eb
Songs live on but I'm dancing alone.
Eb          Bb    Eb
Where is my lullaby?


Verse 2:

Eb                        Bb
Sometimes I forget you're gone.
           Ab                   Eb
You're all I have, known for so long.


Pre-chorus:

Ab     Bb            Eb
Do you know that I'm lost?
        Ab      Bb         Eb5 
And you left me here on my own.


Chorus:

Eb         Bb         Ab      Eb
Songs live on but I'm dancing alone.
Eb          Bb    Eb
Where is my lullaby?

Eb-Bb-Ab-Bb
(Two bits of singing together...)

Pre-chorus:

Ab     Bb            Eb
Do you know that I'm lost?
        Ab      Bb         Eb5 
And you left me here on my own.

Chorus:

Eb         Bb         Ab      Eb
Songs live on but I'm dancing alone.
Eb         Bb       Ab           Bb      Eb
My hand is lost without yours to hold in mine.
    Bb             Ab      Eb
And tonight I will say goodbye.