I couldn't find the tab for this anywhere, so I tried to make it myself. You can split the guitar 
part into two separate parts, it's easier to learn it that way.  

Intro bit (0:24 - 0:34) 

e|------------------------| 
B|------------------------| 
G|-3-/4-/6-/8--8--8--8--8-| 
D|-4-/6-/8-/9--8--8--8--8-| 
A|------------------------| 
E|0--0--0--0--0--0--0--0--| 



Verses ('Never wanted, never needed' bits as well as 'but it gets better' parts) 

e|---------------------4--------------------------------| 
B|-554-4-442-2-442-2-555-5-554-4-442-2-442-2------------| 
G|-443-3-444-4-333-3-44--4-443-3-443-3-332-2-464-4-46464| 
D|-------------------------------------------466-6-46666| 
A|------------2--1-----------4--------2--2--------------| 
E|0--0--4--4--------0--0--0-----4-03--------0--0--0--0--| 



Pre-Chorus' ('tube of toothpaste' / 'minibar' parts) 

e|-------------------------------------| 
B|-555-5-444-4-222-2-555-5-222-2-22----| 
G|-444-4-555-5-333-3-666-6-000-0-00464-| 
D|------------------------1--1--1--466-|  (then back to the verse part for 'But it gets better') 
A|4--4--------------4--4---------------| 
E|------4--4--2--2---------------------| 



(once the bass comes in at 1:35 the lower guitar part is kind of drowned out and harder to hear so 
it might not be exact) 

'Does it get better?' part (3:20)  
e|------------------------| 
B|------------------------| 
G|-464-4-46464-464-4-46464| 
D|-466-6-46666-466-6-46666|    x4 and then go back to the verse and you're finished :) 
A|------0--0--------------| 
E|4--4--------0--0--0--0--| 


************************************ 

| /   slide up 
| \   slide down 
| h   hammer-on 
| p   pull-off 
| ~   vibrato 
| +   harmonic 
| x   Mute note 
| b   Bend 
| pb  Pre-bend 
| br  Bend release 
| pbr Pre-bend release 
| brb Bend release bend 

************************************