This song has a beautiful melody and lyrics.
I could not find chords online anywhere, so I put together this contribution.
The chords are my interpretation, and not necessarily intended to be an accurate 
representation of the artist's work.

Artist: Westlife
Title: Maybe Tomorrow

Submitted: 10/01/2011 by zebratab

Standard tuning, no Capo
D    x00232
E    022100
Em   022000
F#m  133211
G    355433
A    x02220    577655 alternate (A*)
B    224442    799877 alternate (B*)
Bm   224432
C#m  446654

Intro: D D F#m F#m Bm G A*

Verse:
D                  F#m                Bm
Can't believe it's over, that you're leaving,
            G       A
Weren't we meant to be?
D                    F#m               Bm
Should've sensed the danger, read the warnings
                G       A
Right there in front of me

      G                    A
Just stop, let's start it over
               Bm  A    G
Couldn't I get one more try?

Chorus:
G       D                             A
Maybe tomorrow you'll say that you're mine
        Bm               G
You'll realize, I could change
G          D                     A
I'm gonna show you I'm in it for life
             Em   A   G
I'll get you back someday
A*      D
Maybe tomorrow

Verse:
D           F#m             Bm
I forgot to be there, I was selfish
      G        A
I can see that now
D                  F#m                 Bm
I should've got to know you, should've held you
          G           A*
When your tears fell down

     G                   A
Just stop. Don't make me beg you
                    Bm    A   G
Tell me that you'll stay the night

Chorus:
G       D                             A
Maybe tomorrow you'll say that you're mine
        Bm                G
You'll realize, I could change
G          D                      A
I'm gonna show you I'm in it for life
             Em   A   G
I'll get you back someday
       F#m  G  A*
I will find a way

Bridge: (changes to Key of E)
       C#m
Wait a minute,
     B                        A*
Just hear me out this time I promise
              C#m
I'll put you first
      C#m
Turn around now,
      B                        A*
Your heart can't let you walk away
                B*
I'll do what it takes

Chorus:
A*       E                             B
Maybe tomorrow you'll say that you're mine
        C#m                         A*
You'll realize (realize), I could change (I can change)
A*         E                      B
I'm gonna show you I'm in it for life
             F#m  B   A*
I'll get you back someday
B*      E
Maybe tomorrow

E
There's so much I wanna say now
                    A                         E
I just wanna make a life with you (don't walk away)
E
There's so much I wanna do now
                  A
I just wanna make love to you

Outro:
        E           A
Maybe tomorrow  (oh no)
        E
Maybe tomorrow

End.