I'm tabbing this on an acoustic guitar, so it sounds better (cleaner) without using bar 
On an electric it gives the desired effect.
Also this is only the second song I've tabbed...enjoy

Table of Chords
---------------
        EADGBe

Verse  (Finger Picking)
F       x33211
C       x32010
G       320003
F       133211
C       x32010
G       320003
Am      x02210

Chorus (Bar Chords for electric)
F       133211
Am      5775xx
C       x35553
G       355433
F       133211
Am      5775xx
G       355433
Am      5775xx

Verse 1

         F   C

Its been 18 days

           G

Since I'd look at myself

              F       C

I don't wanna have to change

                G       Am

If I don't then no one will

         F        C

Is it my state of mind

               G

Or is it just everything else

              F          C

I don't wanna have to be here

             G            Am

I don't understand it now

Chorus

               F   Am

Cause its been 18 days

         C         G

Since I first held you

              F         Am

But to me it feels just like

                 G     Am

It feels like a lifetime

                   F    Am

I'm trying hard to re-arrange

                 C                G

Some say its the hardest thing to do

                   F   Am

But that's another 18 days

        G

Without you..


Repeat
Verse  (Finger Picking) x 2
F       x33211
C       x32010
G       320003
F       133211
C       x32010
G       320003
Am      x02210

Chorus (Bar Chords for electric) x 2
F       133211
Am      5775xx
C       x35553
G       355433
F       133211
Am      5775xx
G       355433
Am      5775xx

----Bridge----

Am   G  F  x3

Am   C  G x1


Verse  (Finger Picking) x 1
F       x33211
C       x32010
G       320003
F       133211
C       x32010
G       320003
Am      x02210

Chorus (Bar Chords for electric) x 2
F       133211
Am      5775xx
C       x35553
G       355433
F       133211
Am      5775xx
G       355433
Am      5775xx


End Chorus

Am   G  F  x3

Am   G  C x1