Hey there!
So This i probably not the "right" way to play it, but it works pretty well for me!:) 
Please rate and comment!:)

CAPO - 3.

C         G
Baby you got me sick
C             G
I don't know what I did
C                G                 Am
Need to take a break and figure it out, yeah
C              G
Got your voice in my head
C              G
Saying let's just be friends
C                   G                     Am
Can't believe the words came out of your mouth

      F
I'm trying to be okay
     Am
Im trying to be alright
      F
But seeing you with him
      Am
Just don't feel right

              C
And I'm like Oww
                    G
Never thought it'd hurt so bad
Am            F
Getting over you
     C
And Oww
                    G
You're giving me a heart attack
Am               F
Looking like you do
         C           G
Cause you're all I ever wanted
   Am              F
Thought you would be the one and Oww
C            G             Am          F
Giving me a heart attack getting over you

C         G
Baby now that you're gone
C              G
I can't stand dunb love songs
C              G                 Am
Missing you is all I'm thinking about
C              G
Everyone's telling me
C              G
I'm just too blind to se
C                 G                  Am
How you messed me up I'm better off now

      F
I'm trying to be okay
     Am
Im trying to be alright
      F
But seeing you with him
      Am
Just don't feel right

              C
And I'm like Oww
                    G
Never thought it'd hurt so bad
Am            F
Getting over you
     C
And Oww
                    G
You're giving me a heart attack
Am               F
Looking like you do
         C           G
Cause you're all I ever wanted
   Am              F
Thought you would be the one and Oww
C            G             Am          F
Giving me a heart attack getting over you