There is a really simple piano line during the verses that goes like this (it's 
not hard to figure out the rhythm)
e|-----------------------------------|
B|-----------------------------------|
G|-----------------------------------|
D|--1----1----1----1-----------------|
A|-3----2----1----0----6-------------|
E|--------------------4----3---3-----|
(So, it's basically Cm/C, Cm/B, Cm/Bb, Cm/A, Cm/Ab, G.)

Chorus:
                    Eb (x43121@3) GAnd (320003@1)I don't want to be alone
Cm (x3101x@1)                     AbSky, (xx1114@1)don't let the sun go
        Eb (x43121@3)      
I'm not ready for the darkness
G (320003@1)                    CmSwear (x3101x@1)upon a heartless soul

Eb (x43121@3)         GAnd (320003@1)I don't want to cry when you go
Cm (x3101x@1)                      AbStay (xx1114@1)a little longer, you know
                  Eb (x43121@3) GG
You're making me feeel
I'm not alone

Bridge:
              Ab (xx1114@1)          
And if I only worry 'bout it
Worry 'bout it, worry 'bout it
            EbI (x43121@3)just keep breaking down
Breaking down, breaking down

AbBoy, (xx1114@1)I could do without
Do without, do without
               G (320003@1)         GA (320003@1)night of the bad dreams, sad things
G (320003@1)                 G (320003@1) Tell me what that means

That's it, have fun! :D