first tab i've given to u-g. i love flyleaf and i love this song. its easy, fun, 
and kills the ladies ;)

intro: C, Am, Em, F (with big E string muted)

chorus/verse pluck e,b,g strings after each chord. listen for timing.

C                      Am                  Em                 F   
 dear my closest friend i'm writing because i miss you so much at night i
            C
alwayse cry.
                              Am
The stillness still reminds me of
                        Em
When we first fell in love
                       F
And I miss that so much
                        C, Am, Em, F
Dear my closest friend
                        C, Am, Em, F
Dear my closest friend
C
I remember when
                    Am
You asked me to stay
                      Em
And I just walked away
           F
I apologize
                       C
And then my letter sent
                  Am
I lost that moment
                   Em
I lost that moment
                 F
Seconds at a time
                 C
Seconds at a time
                      Am
I wait for your answer
                  Em
But I already know
                         F
Your hand was always mine
                         C
Your hand was always mine
                         Am
Your hand was always mine
                      Em
Dear my closest friend
                    F
I'm writing because
                  C
I miss you so much

and thats it, if you have any questions/ corrections im nickelizondo9@gmail.com