Hey this is a great song! And it sounds really good acoustic too!
This entire tab is based off of the other tabs that are already posted.
I just fixed some little things (lyrics, a few wrong notes).

Tuning: Standard
Capo: 1st fret

Intro:
D, A, G x2

Verse 1:
DTop (xx0232@1)down in the summer sun
GThe (320003@1)day we met was like a hit and run
    Em (022000@1)                   AAnd (x02220@1)I still taste it on my tongue
(taste it on my tongue)
DThe (xx0232@1)sky was burning up like fireworks
GYou (320003@1)made me want you oh so bad it hurts
   Em (022000@1)                         ABut (x02220@1)girl, in case you haven't heard
              

Chorus:
              BmI (x24432@1)used to be love drunk
              GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
            AForever (x02220@1)is over
                BmWe (x24432@1)used to kiss all night
                 GNow (320003@1)it's just a barfight
                 DSo (xx0232@1)don't call me crying
               ASay (x02220@1)hello to goodbye         
      G (320003@1)      ACause (x02220@1)just one sip
      Bm (x24432@1)      AWould (x02220@1)make me say
              BmI (x24432@1)used to be love drunk
               GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
A (x02220@1)              
But now it's over
D (xx0232@1)            A (x02220@1)  G(hey! (320003@1)hey! hey! hey! hey! hey! hey! hey!)

Verse 2:
DHot (xx0232@1)sweat and blurry eyes
GWe're (320003@1)spinning on a roller coaster ride
      Em (022000@1)                   AThe (x02220@1)world stuck in black and white
DYou (xx0232@1)drove me crazy every time we touched
GNow (320003@1)im so broken that i can't get up
    Em (022000@1)                     AOh (x02220@1)girl, you make me such a lush


Chorus:
              BmI (x24432@1)used to be love drunk
              GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
            AForever (x02220@1)is over
                BmWe (x24432@1)used to kiss all night
                 GNow (320003@1)it's just a barfight
                 DSo (xx0232@1)don't call me crying
               ASay (x02220@1)hello to goodbye         
      G (320003@1)      ACause (x02220@1)just one sip
      Bm (x24432@1)      AWould (x02220@1)make me say
              BmI (x24432@1)used to be love drunk
               GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
A (x02220@1)              
But now it's over


Breakdown:
GAll (320003@1)the time I wasted on you
D (xx0232@1)                           AAll (x02220@1)the bullshit you put me through
GI'm (320003@1)checking into rehab
GCause (320003@1)everything that we had
D (xx0232@1)                     A (x02220@1) GDidn't (320003@1)mean a thing to youuuuuuuuu


(One strum)   Bm
I used to be love drunk
               GBut (320003@1)now I'm hungover
           DI'll (xx0232@1)love you forever
A (x02220@1)           
But now it's over...........


Capo: 3rd fret (don't worry, there's time to switch it!)

Chorus:
              BmI (x24432@1)used to be love drunk
              GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
            AForever (x02220@1)is over
                BmWe (x24432@1)used to kiss all night
                 GNow (320003@1)it's just a barfight
                 DSo (xx0232@1)don't call me crying
               ASay (x02220@1)hello to goodbye         
      G (320003@1)      ACause (x02220@1)just one sip
      Bm (x24432@1)      AWould (x02220@1)make me say
              BmI (x24432@1)used to be love drunk
               GBut (320003@1)now I'm hungover
                 DI'll (xx0232@1)love you forever
A (x02220@1)              
But now it's over

Outro:
D (xx0232@1)               ANananana (x02220@1)na na na na na
G (320003@1)               A (x02220@1)   > x4
Nananana na na na na na 

End on:
             D~ (let ring)
But now it's over