For a detailed video lesson and the exact strumming pattern, check out this video lesson:
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Put your capo on fret 3

[Intro]

|   Dm   |   G    |     C    |    Am   |


[Verse 1]

Dm                         G
I was fine before I met you
                      Am
I was broken but fine
I was lost and uncertain
But my heart was still mine
 Dm                         G
I was free before I met you
                     Am
I was broken but free
All alone in the clear view, but now you are all I see


[Pre-Chorus]

Dm                G
Hey, wait a minute
                         C
No, you can't do this to me
Hey, wait a minute
     Am
No, that's not fair
Dm                  G
Hey, wait a minute
You're running back to me
C                      A7     
I really like you, but I'm so scared


[Chorus]

Dm              G
Why'd you have to go and make me like you?
C              Am
Yeah this is a feeling I'm not used to
Dm             G
Why'd you have to go and make me like you?
C                       A7                    
I'm so mad at you cause now you got me missing 
Dm          G 
You   Ah ah ah      ah ah ah 
Cmaj7             Am
You     Ah ah ah  Cause now you got me missing you


[Verse 2]

Dm                           G
Something I could get used to
                       Am
I could get used to this
It's getting harder to leave it
Your lips on my lips
Dm                     G
Oh, I can't believe it
                   Am
How good it could be
Didn't wanna believe it, but now you are all I see


[Pre-Chorus 2]

Dm                G
Hey, wait a minute
                         C
No, you can't do this to me
Hey, wait a minute
     Am
No, that's not fair
Dm                  G
Hey, wait a minute
You're running back to me
C                      A7     
I really like you, but I'm so scared


[Chorus 2]

Dm              G
Why'd you have to go and make me like you?
C              Am
Yeah this is a feeling I'm not used to
Dm             G
Why'd you have to go and make me like you?
C                       A7                     Dm
I'm so mad at you cause now you got me missing you
           G
Why'd you have to go and make me like you?
C              Am
Yeah this is a feeling I'm not used to
Dm             G
Why'd you have to go and make me like you?
C                       A7                     Dm
I'm so mad at you cause now you got me missing You
(Dm)   G 
Oh God, thank God I found you
C     Am    
Oh God, cause now you got me missing you
Dm     G           
Oh God, thank I found you
C                  A7
I'm so mad at you cause now you got me missing you


[Bridge]

Dm        G
              Thank God
Cmaj7     Am
              Thank God that I found you, oh
Dm        G
Cmaj7  
Now you got me missing you, now you got me missing you


[Chorus]

Dm              G
Why'd you have to go and make me like you?
C              Am
Yeah this is a feeling I'm not used to
Dm             G
Why'd you have to go and make me like you?
C                       A7                     Dm
I'm so mad at you cause now you got me missing you
           G
Why'd you have to go and make me like you?
C              Am
Yeah this is a feeling I'm not used to
Dm             G
Why'd you have to go and make me like you?
C                       A7                     Dm
I'm so mad at you cause now you got me missing You
(Dm)   G 
Oh God, thank God I found you
C     Am    
Oh God, cause now you got me missing you
Dm     G           
Oh God, thank I found you
C                  A7
I'm so mad at you cause now you got me missing you