I adjusted the ending to have it end a little simpler. The (C-D-E on top) at the end 
means to play separately in an ascending melody over the chord.

Hope you enjoy playing my first chord submission :)

                      Eb
Do you want to build a snowman?
                     Bb/D
Come on let's go and play
                Cm
I never see you anymore
     Ab/C
Come out the door,
                      Bbm  Eb
It's like you've gone away
                   Ab
We used to be best buddies
    Gm        Cm/G
And now we're not
  Gsus4           G       Cm   F
I wish you would tell me why
                       Fm
Do you want to build a snowman?
                        Bb
It doesn't have to be a Snowman

Young Elsa: Go away, Anna
                     Eb
Toddler Anna: Okay, bye


                        Eb
Do you wanna build a snowman?
                           Bb/D
Or ride our bike around the halls
                          Cm
I think some company is overdue
                Ab/C                       Bbm    Eb
I've started talking to the pictures on the walls
(Hang in there, Joan)
                   Ab
It gets a little lonely
         Gm      Cm/G
All these empty rooms
      Gsus4         G         Cm   F
Just watching the hours tick by
(Tic-Tock, Tic-Tock)


                        Eb
Please, I know you're in there
                            Bb/D
People are asking where you've been
                              Cm
They say have courage, and I'm trying to
              Ab/C                    Bbm  Eb
I'm right out here for you, just let me in
              Ab
We only have each other
         Gm      Cm/G
It's just you and me
Gsus4        G    Cm (C-D-E on top) F (C-D-E on top)
What are we gonna do?
                    Fm       Bb       Eb
Do you wanna build a snowman