Ok, this is the first song I’ve tabbed on this site.
It’s a lovely song, shame that it isnt an original composition of Pritam.
Like the way Atif sings it though.
I got the lyrics from online so I've not read them to find 
errors in them :(

The chords in the intro sound accurate if F#min is played at the 9th fret and then move 
up towards the nut as you play the other chords. Or they’re gonna sound a bit off!

Intro:
F#m/D/E/C#m/D/D
D/E/F#m/D/E/C#m/Bm/Bm
Note: IMO F#min7, Dmaj7 & Bm7 sound good too instead of F#m, D & Bm in the intro. Also 
notes of the chords in the intro are played over the entire first verse if you listen to 
song.

Verse 1:
F#m      E
Pehli nazar mein
       D                E
Kaise jaado kar diya
F#m       E
Tera ban baita hai
    Bm            E
Mera jiya
F#m       E
Jaane kya hoga
    D                  E
Kya hoga kya pata
F#m       E
Is pal ko milke
     Bm
Aa jee le zara

A         E
Mein hoon yahan
F#m       D
Tu hai yahan
     A          E
Meri bahon mein aa
F#m        D
Aa bhi ja

 A         E
[O jaan-E-jaan
F#m    D
Dono jahan
A            E
Meri bahon mein aa
F#m       D
Bhool Ja aa ] x 2


Intro chords are played all over again here
Baby i love u, baby i love you, baby i love you, baby i love you … so..
Baby i love u
Oh i love u
I love u
I love u so
Bm       A      Bm     C#m   D
Baby i love u

Note in the verse below A/Bm/C#m/D are being played throughout, listen to the song for it
Verse 2:
 A             Bm          D
[Har dua mein shamil tera pyaar hai
A          Bm         E
Bin tere lamha bhi dushwar hai
A            Bm           D
Dhadhkon ko tujhe se hi darkar hai
      E
Tujhse hai rahtein
E
Tujhse hai chahtein ] x 2


A       E  F#m      D
Tu jo mili ek din mujhe
A              E     F#m     D
Mein kahin ho gaya lapata

[O jaan-E-jaan
Dono jahan
Meri bahon mein aa
Bhool Ja aa ] x 2

Verse 3: same chords as in verse 2.
[Kar diya Deewana dard-e-Kash ne
Chain cheena isqh ke ehsaas ne
Bekhayali di hai tere pyaas ne
Chaya suroor hai
Kuch to zaroor hai] x 2

Yeh dooriyan
Jeene na de
Hal mera tujhe na pata

[O jaan-E-jaan
Dono jahan
Meri bahon mein aa
Bhool Ja aa] x 2

Baby i love u, baby i love you, baby i love you, baby i love you … so..
Baby i love u
Oh i love u
Baby I love u
Bm           A
I love u…