The main guitar in this song is in Open D Tuning which means the six guitar strings, 
lowest pitch to highest, should be tuned like this: D A D F♯ A D.

So take your Low E, High E, and B string and drop them a whole step. Then drop your G 
a half step.

This song has some beautiful sounding guitar parts in it so I decided to do a tab for 
Be prepared to use your thumb to play some of these chords though.

On the Intro and the Bridge I didn't notate the rhythm, just the chords. So listen 
to the song for that.

OK so here we go!

v = Down stroke
^ = Up stroke

   Intro
D |--0------0------|
A |--2------2------|
F#|--1------1------|
D |--2------x------|
A |--2------3------|
D |--2------3------|
Throw in some 0's on the low D string here too like the bass part is doing.

   The Crescendo Part
D |--3-3-3-3-5-3-3-3-108-8-8-108-8-8--|
A |--3-7-3-7-3-7-3-7-8-128-128-128-12-|
F#|--3-3-6-3-3-3-6-3-8-8-118-8-8-118--|
D |--3-3-3-3-3-3-3-3-8-8-8-8-8-8-8-8--|
A |--3-3-3-3-3-3-3-3-8-8-8-8-8-8-8-8--|
D |--3-3-3-3-3-3-3-3-8-8-8-8-8-8-8-8--|
     v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^

   Main Guitar Part
D |------2-0---x---2---0---x---0---5---0---x---0---5---0---x---|
A |------4-0---4---4---0---4---0---7---0---7---0---7---0---7---|
F#|------3-3-3-3-3-3-3-3-3-3-3-3-3-6-6-6-6-6-6-6-6-6-6-6-6-6-6-|
D |--4---4-4-4-4-4-4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7-7-7-7-7-7-7-|
A |--0---0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
D |--0---0-0-0-0-0-0-0-0-0-0-0-0-0-----------------------------|
     v   v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v

   Main Guitar Part 2
D |----------12--10------0-------12------10------10h12---0-------|
A |----------0---0-------0-------0-------0-------0-------0-------|
F#|----------11--11--11--11--11--11--11--11--11--11--11--11--11--|
D |--12------12--12--12--12--12--12--12--12--12--12--12--12--12--|
A |--0-------0---0---0---0---0---0---0---0---0---0---0---0---0---|
D |--0-------0---0---0---0---0---0---0---0---0---0---0---0---0---|
     v       v   ^   v   ^   v   ^   v   ^   v   ^   v   ^   v
* I spaced it out to be a bit easier to read, not actually slower.

D |--5---0---x---0---5---0---x---|
A |--7---0---7---0---7---0---7---|
F#|--6-6-6-6-6-6-6-6-6-6-6-6-6-6-|
D |--7-7-7-7-7-7-7-7-7-7-7-7-7-7-|
A |--0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
D |------------------------------|
     v ^ v ^ v ^ v ^ v ^ v ^ v ^

   Part after Main Guitar part 2 and the Bridge
D |--2-2-2-2-2-2-2-2-2-2-2-2-2-5-5-5-5-5-5-5-5-5-5-5-5-5-5-|
A |--4-0-4-0-4-0-4-0-4-0-4-0-4-7-0-7-0-7-0-7-0-7-0-7-0-7-0-|
F#|--3-3-3-3-3-3-3-3-3-3-3-3-3-6-6-6-6-6-6-6-6-6-6-6-6-6-6-|
D |--4-4-4-4-4-4-4-4-4-4-4-4-4-7-7-7-7-7-7-7-7-7-7-7-7-7-7-|
A |--0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-0-|
D |--0-0-0-0-0-0-0-0-0-0-0-0-0-----------------------------|
     v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v ^ v

   Bridge
D |------------------------------------------------------------------------|
A |------------------0---(2)--------0-----------------------0---(2)--------|
F#|--9---------------3------2-------3-------9---------------3------2-------|
D |--7---------------2------2-------2-------7---------------2------2-------|
A |--6---------------3------2-------3-------6---------------3------2-------|
D |--9---------------2------2-------2-------9---------------2------2-------|


D |-------------------------------------------|
A |--0---(2)--------0----(2)--------0-------5-|
F#|--3------2-------3-------2-------3-------3-|
D |--2------2-------2-------2-------2-------4-|
A |--3------2-------3-------2-------3-------0-|
D |--2------2-------2-------2-------2-------0-|

D |-----
A |--4--
F#|--3--
D |--4--
A |--0--
D |--0--
The end is Main Guitar Parts one and two, but the last chord goes like this.

OK from that you should be able to figure out how it goes.

Enjoy!