Relient K - My Girls Ex-boyfriend Acoustic Chords & Tabs

My first tab. I transcribed it from the Tab book for the album Mmhmm from power 
chords to an acoustic tab


F5             
When he was seeing her
              C5                G5
You could see he had his doubts
F5
And now he's missing her
        C5                    G5
Because he knows he's missing out
F5
Now it's haunting him
         C5               G5
The memories like a ghost
F5
He's so terrified
                  C5               G5
Cause no one else even comes close


F5           C5                            
He's the guy that you should feel sorry for
F5                   C5                  G5
He had the world but he thought that he wanted more
F5                      C5                   D5
I owe it all to the mistake he made back then
      A5        F5           C5
I owe it all to my girl's ex-boyfriend


F5             
So then, along comes me,
     C5                  G5
This undeserving mess
F5
Who would believe
    C5                    G5
My life would be so blessed
   F5
Two years ago
         C5               G5
He left all that debris
F5
Who would have known
                  C5              G5
He would leave everything I need
[ Tab from: https://www.guitartabs.cc/tabs/r/relient_k/my_girls_ex_boyfriend_acoustic_crd.html ]
F5           C5                            
He's the guy that you should feel sorry for
F5                   C5                  G5
He had the world but he thought that he wanted more
F5                      C5                   D5
I owe it all to the mistake he made back then
      A5        F5           C5
I owe it all to my girl's ex-boyfriend

        F5
If it wasn't for him
   C5              G5
I would still be searching
        F5
If it wasn't for him
   A5              G5
I wouldn't know my best friend
        F5
If it wasn't for him
     C5
He would be able to see
       A5
If it wasn't for him
F5          G5        C5
He'd be as happy as me

F5                     C/E  G5
When she and I settle down you can bet
F5            C/E             G5   
That he is going to have to settle for less
F5                C5        G5
He's someone that I would hate to be
A5         G5            F5                Fm
I got the girl and he's left with just the memory.

F5           C5                            
He's the guy that you should feel sorry for
F5                   C5                  G5
He had the world but he thought that he wanted more
F5                      C5                   D5
I owe it all to the mistake he made back then
      A5        F5           C5
I owe it all to my girl's ex-boyfriend

        F5
If it wasn't for him
   C5              G5
I would still be searching
        F5
If it wasn't for him
   A5              G5
I wouldn't know my best friend
        F5
If it wasn't for him
     C5
He would be able to see
       A5
If it wasn't for him
F5          G5        C5
He'd be as happy as me