So this song contains 3 main parts: Verse RIFF, Pre-Chorus RIFF, and Chorus RIFF. 
Listen to the song and put them in order and you'll be good to go. Also check out 
my cover of the song on YouTube at HRchoni2.

Verse RIFF

Cadd9 (x32030@1)G (320003@1)    Am7 (x02010@1)  G (320003@1)    Em (022000@1)D/F# (200232@1)name="chord_320002@1">G/F# Ce|-0~3-------0-----0-------0-------------| (x32010@1)B|-3~--3-3~----0-1---1-0---------------3-|
G|-0~------0-------------0-----0---2-4-0-|
D|-x~------------2-------------2---0-0---|
A|-3~------------0---------------------3-|
E|-------3~------------3-------0-0-2-3---|

Pre-Chorus RIFF

Cadd9 (x32030@1)      G/B (143121@7)       C7 (x32310@1)name="chord_x20232@1">D/B  F7e|-----0-----------0---------------5~| (131241@1)B|-------3-----------3------5-3-3--4~|
G|---0-------0---0-------0--4-2-2----|
D|---------------------------------3~|
A|-3-------3---2-------2----3-2------|
E|-----------------------------------|

Chorus RIFF          
                       
   G/F# (320002@1)       Cmaj7 (x32000@1)(2x)  Em (022000@1)        A7 (x02020@1)        Am7 (x02010@1)      D7e|-------------------------|-------------------------------------2~| (xx0212@1)B|-----0-----------0-------|-----0-----------2-----------1-------1~|
G|-------0---0-------0---0-|-------0---0-------0---0-------0---0-2~|
D|---4-----4-----2-----2---|---2-----2-----2-----2-----2-----2---0~|
A|-------------3-----------|-------------0-----------0-----------0~|
E|-3-----------------------|-0-------------------------------------|

-Enjoy,
            Josh(ua)