its really not that hard, really. Just 4 basic chords.
C, G, Am, and Em.

Heres the order:

VERSE:

CAnd (x32010@1)i.

CAnd (x32010@1)i thought it up and said

G (320003@1)              Am (x02210@1)        CA (x32010@1)little bit longer and i'd be fine


CHORUS:

Am (x02210@1)                 Em (022000@1)              GBut (320003@1)you don't know what you got 'til it's gone

Am (x02210@1)                 Em (022000@1)              GAnd (320003@1)you don't know what it's like to feel so low

Am (x02210@1)                 Em (022000@1)              GAnd (320003@1)everytime you smile or laugh you glow

                Am (x02210@1)  Em (022000@1)   G (320003@1)  
You don't even know, know, know.

                AmYou (x02210@1)don't even know.

REPEAT VERSE

REPEAT CHORUS


                Am (x02210@1)  Em (022000@1)   G (320003@1)  
You don't even know, know, know.

                CYou (x32010@1)don't even know.



Listen to the song for the strumming.
http://youtube.com/watch?v=0E48EgMkxr8