It's a cover of a famous song ( originally performed by .. ehm.. Mr. X ? )
singed by Mariah Carey from the album "MUSIC BOX"
It's really played in F#, but it's more human in E ( for all who wants
to sing in Mariah Carey's way ); if you want the real tonality, put the
capo on the 2nd fret.
The intro goes (more or less ) like this

    B       E
e:--2---2---0---0-- | 
B:--0---0---0---0-- | 
G:----------------- | 

and it's really played by the piano. The piano also plays the G# with
all the basses added ( Ab   Ab/Bb   Ab/C   Ab/C# )

                  CUT HERE
============================================================================
                WITHOUT YOU          ( Mariah Carey )
                ===========

           B     E       B     E
 Intro:  [ /  /  /  /   |  /  /  /  / ]

        E
   No I can't forget this evening
           C#m7
   Or your face as you were leaving
         F#m
   But I guess that's just the way
             Ab     Ab/Bb   Ab/C   Ab/C#
   the story goes
              C#m              C#m/B             F#add6   F#
   You always smile but in your eyes your sorrow shows
          E     B7
   Yes it shows

        E
   No I can't forget tomorrow
          C#m7
   When I think of all my sorrow
         F#m
   When I had you there but then I
           Ab     Ab/Bb   Ab/C   Ab/C#
   let you go
               C#m               C#m/B          F#add6   F#
   And now it's only fair that I should let you know
                   E      B7
   What you should know

                     E        C#m
   CHORUS:   I can't live, if living is without you
                    F#m            B7/4    B7
             I can't live, I can't give anymore
                     E        C#m
             I can't live, if living is without you
                    F#m            B7/4    B7
             I can't give, I can't give anymore

          E
   Well I can't forget this evening
           C#m7
   Or your face as you were leaving
         F#m
   But I guess that's just the way
             Ab     Ab/Bb   Ab/C   Ab/C#
   the story goes
              C#m              C#m/B             F#add6   F#
   You always smile but in your eyes your sorrow shows
          E     B7
   Yes it shows

   CHORUS

   ( ad libitum sfumando )