Just something I tried because I love this song and couldn't find the chords anywhere. 
I've been singing it on Capo 2, but only because I can't sing low enough without. Enjoy!


Intro:
  G D Em C x2

G          D           Em                     C
I wanna be next to you and watch you while you sleep
G          D           Em                C
Holding you lost inside every breath you breathe

Chorus:
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy


G                D                Em                 C
One minute more a thousand years it's all the same to me
G                     D                   Em                 C
Cause I'm incomplete and I need you more with every breath I breathe

Chorus:
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy

Bridge:
G                     D
I try to let you know but my words get tangled up
Em                              C
and every time I find that I'm outside looking in
G                       D
Can't let this moment go when you're the only one
Em                                C
That makes me feel the way I feel inside

G          D          Em   C
Lately I'm falling for you
G          D          Em   C
Lately I'm falling for you

Chorus:
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy
G
I don't wanna live a day without you
D                                   Em        C
I just wanna be the one that makes you happy, happy