Hey I was looking for these chords on the internet , but noone had them ( correct) 
so i decided to put some time in it and this is what i have so far , i suspect the 
verse is not 100 percent correct ,but it might... lol
Anyway here it is

Transpose + 1
intro:
Gmadd9 ( play the la at the top)  Eb   Bb
Gm add9  Eb Bb

Verse 1:
               Gmadd9 (355333@1) EbYou (x43121@3)just don't know it
      BbIt's (x1333x@1)getting hard to say hello
               Gmadd9 (355333@1) EbYou (x43121@3)just don't know it
     BbI'm (x1333x@1)on the edge of crossing the line
                Gmadd9 (355333@1)    FI (133211@1)don't want to blow it or show it
                       EbBefore (x43121@3)you know you're mine

You just don't know it

[Chorus:]
Bb (x1333x@1)           AbOh, (xx1114@1)you won't see me break
             Eb (x43121@3)           BbWon't (x1333x@1)make that mistake Oh no
            AbI'll (xx1114@1)just walk away
            Eb (x43121@3)                C#There's (x43121@1)too much at stake right now
  CmI (x3101x@1)go on and on
Fm (133111@1)          Eb (x43121@3)        C#Singing (x43121@1)this song about you
     C# (x43121@1)          Eb (x43121@3)           FmAnd (133111@1)that's what's wrong with this song

Rest is the same exept bridge

Can you feel it?
In the way I look at you
Girl, can you hear it?
I'm crying out inside
I don't want to see you
Be near you
You're a million miles too close

[Chorus]

[Bridge:]
Bbm (x13321@1)                AbYou (xx1114@1)don't know the way I feel (the way I feel)
Bbm (x13321@1)         AbSo (xx1114@1)I'll stay alone (stay alone)

[Chorus]

That's what's wrong
That's what's wrong with this song
That's what's wrong with this song
That's what's wrong with this song

You just don't know it.