The whole song is played with those four chords.
You can play Em instead of G if you want it to sound more sad.
C G
Where were you when I was lonesome?
F Cadd9
Locked away in this freezing cold
C G
Someone flying, only stolen,
F Cadd9
I can't tell, this night's so old,
I don't want to swim the ocean
I don't want to fight the tide
I don't want to swim forever
When it's cold I'd like to die
What was that my sweet sweet nothing?
I can't hear you through the fog
If I holler let me go
If I falter let me know
[Refrain]
I don't want to swim forever
I don't want to fight the tide
I don't want to swim the ocean
When it's cold I'd like to die
I don't want to swim the ocean
I don't want to figh the tide