It's very simplefied and I'm not sure if it's right. Maybe you hear something that 
i don't. But enjoy it anyway because it's the only chord I can find right now at least. :-)

Befor you start playing: remember that the song is in three time!

Verse
G C G C
G C Em D

Bridge
Am C Am D

Refr
G D Em C x2

Verse

Bridge

Refr

"I won't let go..."
G C G D x2

Refr