How to read tablature? 
Intro - strum or fingerpick, x2 -:

    B             Abm            E               Gb 
xA|-------3-----|-------0-----|-------0----0~-|-2-----|
xE|----0-----0--|----0-----0--|----1------1---|---3---|
xC|-0---------0-|-0---------0-|---------------|-----2-|
xG|-------------|-------------|-2-------------|-------|

Verse:
B               Abm                 E 
I remember your bare feet down the hallway
  Gb                    B 
I remember your little laugh
                 Abm 
Race cars on the kitchen floor
        E            Gb                         B   - Intro part - Abm  E  Gb 
Plastic dinosaurs, I love you to the moon and back

Verse
B               Abm                E                 Gb                  B 
I remember your blue eyes looking into mine like we had our own secret club
               Abm             E             Gb                       B 
I remember you dancing before bed time then jumping on me waking me up
                     Abm 
I can still feel you hold my hand
E           Gb                       B 
Little man, from even that moment I knew
                           Abm 
You fought it hard like an army guy
  E                      Gb 
Remember I leaned in and whispered to you

Chorus:
E                  Gb 
Come on baby with me
                    B      E 
We're gonna fly away from here
    E       Gb          B     Abm  E  Gb 
You were my best four years

Verse:
B              Abm                  E 
I remember the drive home when the blind hope
          Gb                      B 
Turned to crying and screaming, "Why?"
                        Abm 
Flowers piled up in the worst way
             E                   Gb 
No one knows what to say about a beautiful boy who died

Verse:
B                    Abm 
And it's about to be Halloween
             E            Gb                        B 
You could be anything you wanted if you were still here
               Abm              E 
I remember the last day when I kissed your face
  Gb 
I whispered in your ear

Chorus:
E                  Gb 
Come on baby with me
                    B      E 
We're gonna fly away from here
E                      Gb                          B 
 Out of this curtained room in this hospital grey
                 E 
We'll just disappear
                  Gb 
Come on baby with me
                   B       E 
We're gonna fly away from here
    E       Gb         B 
You were my best four years

- Intro part -

Bridge:
            E                Gb                B 
What if I'm standing in your closet trying to talk to you?
          E                Gb                    B 
What if I kept the hand me downs you won't grow into?
              E                   Gb             B 
And what if I really thought some miracle would see us through?
                E           Gb                E           Gb - once -
But what if the miracle was even getting one moment with you

Chorus:
- E -               Gb 
Come on baby with me
                   B       E 
We're gonna fly away from here
                  Gb 
Come on baby with me
                   B       E 
We're gonna fly away from here
    E       Gb         B 
You were my best four years

Outro:
B               Abm                 E 
I remember your bare feet down the hallway
  Gb                        B 
I love you to the moon and back