It's a basic G - D - Am - C pattern throughout.

G D Am C
G D Am C

G (320003@1)          
Since you've been gone
D (xx0232@1)          Am (x02210@1)           CAll (x32010@1)I wanted was for you to come
G (320003@1)            DBack (xx0232@1)to me and say sorry
Am (x02210@1)       CBaby (x32010@1)I was wrong
    G (320003@1)         DBut (xx0232@1)I waited my faith is strong
     Am (x02210@1)          CThis (x32010@1)hurt could be undone
G (320003@1)              DTime (xx0232@1)goes by and hope subsides
  Am (x02210@1)         CI (x32010@1)fell for way too long

G (320003@1)          DI (xx0232@1)don't know when it changed
            Am (x02210@1)        CCause (x32010@1)I was always imagining
        GWe'd (320003@1)be together
D (xx0232@1)     Am (x02210@1)      CCause (x32010@1)I loved you
        G (320003@1)             DBut (xx0232@1)Now you're standing here
     AmI (x02210@1)realized 
           CI'm (x32010@1)really healed
           G (320003@1)      DCuz (xx0232@1)I feel better
       Am (x02210@1)               CThan (x32010@1)I thought I could do

G (320003@1)        DI (xx0232@1)cried so many nights
Am (x02210@1)             CWishing (x32010@1)you were by my side
G (320003@1)           D (xx0232@1)      Am (x02210@1)     CMy (x32010@1)heart's so tired of breaking
G (320003@1)      DSuddenly (xx0232@1)here you are
Am (x02210@1)          C (x32010@1)You're saying all the words
G (320003@1)   D (xx0232@1)         AmI (x02210@1)was waiting for
            C (x32010@1)          GBut (320003@1)I don't want you no more

D Am C
G D Am C

G (320003@1)                    DYou (xx0232@1)got the same smile you did before
   Am (x02210@1)                        CIt (x32010@1)used to make me weak in the knees
     G (320003@1)                       DThat (xx0232@1)look in your eyes used to drive me wild
      Am (x02210@1)            C (x32010@1)But I already made my peace
    G (320003@1)              DWho (xx0232@1)knew there could come a time
     Am (x02210@1)                    CWhen (x32010@1)you said yes and I said no
        G (320003@1)      
Cause I missed you so long
          DAnd (xx0232@1)since you been gone
          Am (x02210@1)              CI've (x32010@1)been trying to let you go

G (320003@1)          DI (xx0232@1)don't know when it changed
            Am (x02210@1)        CCause (x32010@1)I was always imagining
        GWe'd (320003@1)be together
D (xx0232@1)     Am (x02210@1)      CCause (x32010@1)I loved you
        G (320003@1)             DBut (xx0232@1)Now you're standing here
     AmI (x02210@1)realized 
           CI'm (x32010@1)really healed
           G (320003@1)      DCuz (xx0232@1)I feel better
       Am (x02210@1)               CThan (x32010@1)I thought I could do

G (320003@1)        DI (xx0232@1)cried so many nights
Am (x02210@1)             CWishing (x32010@1)you were by my side
G (320003@1)           D (xx0232@1)      Am (x02210@1)     CMy (x32010@1)heart's so tired of breaking
G (320003@1)      DSuddenly (xx0232@1)here you are
Am (x02210@1)          C (x32010@1)You're saying all the words
G (320003@1)   D (xx0232@1)         AmI (x02210@1)was waiting for
            C (x32010@1)         G (320003@1)    DBut (xx0232@1)I don't want you no more

Am (x02210@1)     C (x32010@1)                    G (320003@1)   DNo (xx0232@1)more sleeping with the lights turned on
        Am (x02210@1)              C (x32010@1)         G (320003@1)     DNo (xx0232@1)more weeping cause you didn't come home
        Am (x02210@1)   C (x32010@1)         G (320003@1)     DNo (xx0232@1)more lonely inside this heart
     Am (x02210@1)            C (x32010@1)     GYour (320003@1)love don't live here anymore

G (320003@1)        DI (xx0232@1)cried so many nights
Am (x02210@1)             CWishing (x32010@1)you were by my side
G (320003@1)           D (xx0232@1)      Am (x02210@1)     CMy (x32010@1)heart's so tired of breaking
G (320003@1)      DSuddenly (xx0232@1)here you are
Am (x02210@1)          C (x32010@1)You're saying all the words
G (320003@1)   D (xx0232@1)         AmI (x02210@1)was waiting for
            C (x32010@1)          GBut (320003@1)I don't want you no more