this is just what i heard in playing it a few times, please do not assume this is 
completely correct!

h=hammer on
(...)=optional

intro
G|-----------------------------------------------|
D|-----------------------------------------------|
A|-----------------------------------------------|
E|---3---33---3---33---3---33---5---55---5---55--|


verse (i must have been a fool....)
G|--------------------------------------|
D|-------------------------------------.|
A|-------------------------------------.| repeat
E|---3---33---3---33---5---55---5---55--|


pre-chorus (my world just feels so cold...)
G|-----------------------------------------------|
D|--------------------------------------(5h6)----|
A|---2---22---------------------5---55-----------|
E|------------0---00---5---55--------------------|


chorus (i can't lie, you're on my mind...)
G|-----------------------------------------------|
D|---------------------------------------(5h6)--.|
A|------------------------------5---55----------.| repeat
E|---3---33---3---33---5---55--------------------|


(play the verse riff only once, then the pre-chorus and chorus as written)


instrumental
(the same as the chorus)
(bass comes in only on the 2nd refrain)
G|--------------------------------------|
D|--------------------------------------|
A|------------------------------5---55--|
E|---3---33---3---33---5---55-----------|


2nd pre-chorus
G|----------------------------------------------------------------------|
D|---------------------------------------------------------(5h6)--------|
A|---2---22---------------------5---55------------5---55----------------|
E|------------0---00---5---55------------5---55-------------------------|

(repeat chorus riff 6x or until fade...)


there you go :) pretty straightforward.
this is the first song ive ever submitted to ultimate, but i think it's pretty accurate.
I LOVE THIS SONG!!
rate me please:)
happy bassing