was just messin around one day and figured these chords worked. Probably not exact. 
Awesome song, at any rate.

Em                        G
I carved your name in an old oak tree...

Em      G
But... filled...

Em         G
Wrote... single...

      C                  Em--G                  C
Please, give me something, something to hold on to

                         Em         G         C
Give me something that links me to you

               Em--G                    Am (hold)
give me something, something to hold on to

                                                C Em C Em
And I'll wear your wedding ring for a lifetime


{ The chords are all the same for the next verse/chorus }