This is my first tab there are mistakes, no one had this song uploaded
so i figured id try it by ear and this is what it came out to be. For strumming listen 
to the song.
If you find any mistakes comment ill fix it :D

G: 320033
Cadd9: x32033
Gsus2: 200233
Gsus1: 2x023x
  Em7: 022033

Intro: Em7, Cadd9, G, Gsus2, Gsus1

Em7                           Cadd9And (x32030@1)it's hard to know just what you're thinking,
            G (320003@1)           Gsus2 (3x0233@1)Gsus1
When you're looking in my eyes.
         Em7                   Cadd9When (x32030@1)the moonlight shines down on your face,
   G (320003@1)            Gsus2 (3x0233@1)Gsus1
As we say our goodbyes.
         Em7                  Cadd9And (x32030@1)it's hard to know if I am breathing,
       G (320003@1)       Gsus2 (3x0233@1)Gsus1
When I hold you tight.
Em7                    Cadd9Tell (x32030@1)me is this really happening?
      G (320003@1)         Gsus2 (3x0233@1)Gsus1
Cause I feel so alive.

Cadd9, Gsus2
                GGsus2 Gsus1 Cadd9So (x32030@1)won't you be mine?
                GGsus2 Gsus1 Cadd9So (x32030@1)won't you be mine?

Em7                    Cadd9And (x32030@1)it's hard to know if you're believing me,
       G (320003@1)             Gsus2 (3x0233@1)Gsus1
When I tell you how I feel.
       Em7                       Cadd9I (x32030@1)just want you to know that I'm trying,
   G (320003@1)                   Gsus2 (3x0233@1)Gsus1 Cadd9Gsus2
To let you know this is real.

G Gsus2 Gsus1 Cadd9
So won't you be mine?
                GGsus2 Gsus1 Cadd9So (x32030@1)won't you be mine?
             GWon't (320003@1)you be mine?

Cadd9,Gsus1,Em7,Em7,Em7,Em7,Cadd9,Gsus1,Em7,Em7,Em7,Em7

Cadd9
And I know it sounds crazy,
Gsus1
But I won't pretend.
      Em7
Cause I want you forever,

So don't ever forget,
     Cadd9 (x32030@1)    Gsus2,G
That you're my everything.

Whoa.
                GGsus2 Gsus1 Gsus2Gsus1 (3x0233@1)So won't you be mine?
                GGsus2 Gsus1 Cadd9So (x32030@1)won't you be mine?
                GGsus2 Cadd9So (x32030@1)won't you be mine?
                GGsus2 Cadd9So (x32030@1)won't you be mine?