Hey there! So this is my first tab! Opinions are allowed :). This is a great song by a great band!
I'm a Directioner btw. Hope this is accurate since I did it by ear. :). 
Have fun playing! :)xx

Twitter: im_1Drea



Intro:

E B C#m A x2

Verse 1:

E                  B
 Can't believe you're packing your bags
C#m             A
 Trying so hard not to cry
E                   B
 Had the best time and now it's the worst time
C#m             A
 But we have to say goodbye
 
Pre-Chorus:

B                         F#m
 Don't promise that you're gonna write
B                          A
 Don't promise that you'll call
B                      F#m                     B*
 Just promise that you won't forget we had it all
 
CHORUS:
                E             Bm
 Cause you were mine for the summer
         D               A
 Now we know it’s nearly over
             E          Bm
 Feels like snow in September
        D             A
 But I always will remember
          E Bm        A 
 You were my summer love
      E            Bm  A        E
 You always will be my summer love
 
Verse 2:

E                  B  
 Wish that we could be alone now
C#m                       A
 If we could find some place to hide
E                    B
 Make the last time just like the first time
C#m               A
 Push a button and rewind
 

Pre-Chorus:

B                         F#m
 Don't say the word that's on your lips
        B               A
 Don't look at me that way
B                         F#m
 Just promise you'll remember
                B          
 When the sky is grey
 

CHORUS:
                E             Bm
 Cause you were mine for the summer
         D               A
 Now we know it’s nearly over
             E          Bm
 Feels like snow in September
        D             A
 But I always will remember
          E Bm        A 
 You were my summer love
      E            Bm  A        E
 You always will be my summer love

 
Bridge:
            E          B
 So please don't make this any harder
     C#m         A
 We can't take this any farther
        E         B                       C#m        A
 And I know there's nothing that I wanna change, change
 

Chorus: (* strum once)
            E*             Bm*
 Cause you were mine for the summer
         D*               A*
 Now we know it’s nearly over
             E*          Bm*
 Feels like snow in September
        D*             A
 But I always will remember
          E Bm        A 
 You were my summer love
     E              Bm  A       E
 You always will be my summer love
    E               Bm  A        E
 You always will be my summer love
    E               Bm  A       E*
 You always will be my summer love