Trying to play this at party I first realized there was a "silent" F 
missing in the cords (you hear it in the harmonies) and also that 
someone put an Em in the wrong place (I later looked at Garth 
playing it and it should be a C). Also the downward progression 
in the fiddle is not in either the bass nor the guitar. Since most 
people hear this and want to make it part of the playing I ended up
with two alternatives. The first one is simply using the straight 
cords (with two different ways of doing the B7 cord) and the second 
one I do the progression in a different way. Grab the one that suits 
you. 

Wrapped up in you.

(G)How do I love you
(B7)Well let me see
(C)I love you like a lyric loves a (A)melody
(G)Baby, (A)completely,
(C)Wrapped (Cm)up in (G)you

(G)How do I need you
(B7)Well, can't you tell
(C)I need you like a penny needs a (A)wishing well
(G)Baby, (A)completely,
(C)Wrapped (Cm)up in (G)you

Em                          B7                         Em7   A7
Every now and then when the world that we're living in is crazy,
    Am7     Am7/E      G   Am7  G/B  C
You gladly hold me and carry    me   through.
Em                         B7                         Em7    A7
No-one in the world's ever done what you do for me    and I'd be,
Am7      Am7/E     G     Am7  G/B  C      Cm         F   
Sad and lonely, if there were no   yoooooooooooouuuuuuuuuu...

(G)How do I love you
(B7)Well, count the ways
(C)There ain't no number high enough to (A)end this phrase
(G)Baby, (A)completely
(C)Wrapped (Cm)up in (G)you
Ba ba baba ba bah, bah, bah, ba baba ba bah-x's 2-(G)(A)(C)(G)

Em                          B7                         Em7   A7
Every now and then when the world that we're living in is crazy,
    Am7     Am7/E      G   Am7  G/B  C
You gladly hold me and carry    me   through.
Em                         B7                         Em7    A7
No-one in the world's ever done what you do for me    and I'd be,
Am7      Am7/E     G     Am7  G/B  C      Cm         F   
Sad and lonely, if there were no   yoooooooooooouuuuuuuuuu...


(G)How do I love you
(B7)Well don't you know (baby don't you know)
(Em)I love you about as deep as any (A)love can grow
(G)Baby, (A)completely
(C)Wrapped (Cm)up in (G)you

(G)Baby, (A)completely
(C)Wrapped up in you

G         =   320003        A            =   x02220

B7(verse) =   x21202        C            =   x32010
or
B7(chorus)=   x2424x        Cm           =   x35543

Em        =   022000        Am7          =   x02010

Em7       =   02003x        F            =   133211

Em        =   022000        G/B          =   x20033

A7        =   x02020        

I found two different ways to pick the cords on the chorus. Both have the high note
as the fiddle. You have to fill the tempo yourself. I only give the progression.

The first with almost full chords
E  B7 Em7 A7 Am7 Am7/E G  Am7 G/B C  Cm F

0  x  0   x  x   0     3  x   x   x  x  1
2  2  2   0  0   0     x  0   2   3  3  3
2  4  0   2  2   2     x  x   x   x  5  3
0  2  0   0  0   0     0  0   0   0  5  2
0  4  3   2  1   1     0  1   3   1  4  1
0  x  x   x  x   0     x  x   x   x  3  1

Second (bass is walking too)

x  x  x   x  x
x  x  x   4  0
2  1  0   2  2
0  2  0   0  0
0  4  3   2  1
0  0  x   x  x