Originally there's no guitar in this song, but you can play it in arpeggios like in the 
Night At The Theater version.
These are the most accurate chords I could come up with.
You might want to use a capo if you can't reach the high notes with your voice (I know I 
^^)
Hope this is useful :)

DmThe (xx0231@1)world seems not the same,
         Am (x02210@1)            FThough (133211@1)I know nothing has changed.
    DmIt's (xx0231@1)all my state of mind,
       Am (x02210@1)         FI (133211@1)can't leave it all behind.
  Dm (xx0231@1)                   Am (x02210@1)  EI (022100@1)have to stand up to be stronger.

Chorus:

AmI (x02210@1)have to try to break free
                      FFrom (133211@1)the thoughts in my mind.

Use the time that I have,
        Dm (xx0231@1)    GI (320003@1)can't say goodbye,
        FHave (133211@1)to make it right.
        AmHave (x02210@1)to find, cause I know
                Fin (133211@1)the end it's worthwhile,
                                 Dm (xx0231@1)   GThat (320003@1)the pain that I feel slowly fades away.
        FIt (133211@1)will be alright.

I know, should realise
Time is precious, it is worthwhile.
Despite how I feel inside,
Have to trust it will be alright.
Have to stand up to be stronger.

Reprat chorus

Dm, Am

Em (022000@1)          GOh, (320003@1)this night is too long.
          D (xx0232@1)           BI (x2444x@1)have no strength to go on.
        Em (022000@1)        A (x02220@1)     BNo (x2444x@1)more pain, I'm floating away.
            Em (022000@1)            GThrough (320003@1)the mist I see the face
       D (xx0232@1)               BOf (x2444x@1)an angel,who calls my name.
      Em (022000@1)             A (x02220@1)              GI (320003@1)remember you're the reason I have to stay.

Reprat chours