Couldn't find an accurate harmony. Here I post my suggestion. I hope you like it. 
Corrections are welcome. Thank you.

[Verse 1]
          Ab
Don't you wake up yet
             Eb  
Give me some time
                  Fm7
To watch you asleep
             C#
Oh angel of mine
    Ab           Eb
And I would be fine,
                       Fm7
as long as you're near me
              C#
Oh angel of mine 

[Chorus]
       Ab                                         B6
But tomorrow if a golden train came to take you away,
           C#               Ab
Would you go or would you stay [Repeat]

[Verse 2]
Ab                                 Eb
Here in this cozy room just me and you
Fm7           
Cuddling and kissing, making sweet love,
C#
Shooting star wishing and watch the sun come up
              Ab
And then we'll sleep all day
                               Eb
Meet in our dreams and live life our way
                          Fm7
Drop it all off and we'll fly away,
                                C#
Dip through the stars and wake up slowly 

[Chorus]

       Ab                                         B6
But tomorrow if a golden train came to take you away,
           C#               Ab         
Would you go or would you stay [Repeat]

[Bridge]
B6             C#               Ab
 Bap ma u maleeero duip dap dap dap
Ab
Oh one thing I know for sure
       C#                     Ab
Is my love for you is deeper than any root or stone,
              C
Mamma told me so,
       C#                Ab
Don't walk the streets alone [Repeat]

[Chorus]

       Ab                                         B6
But tomorrow if a golden train came to take you away,
           C#               Ab
Would you go or would you stay [Repeat]... with me.