the ticket tells about how to love.. available to all, but forbidden for one...
to interpret the lyrics with the movie, it is shown in Mew's feelings towards Tong..
Here's the translation only from first verse til end of the first chorus of the song...

THE TICKET

You must have heard of the place that if we get to,
we will have everything...

happiness and dreams that's been waiting for will wait
for us at the destination...

and only a single ticket is needed for multiple
return trips, but no one has ever returned
to tell me everything....

So i wonder if it's real, want to see it for myself,
even if it's by foot I'm willing to go, if there
will be something upon arrival..

no matter what I must pay to get the ticket, I will give

and so I paid with everything I have just for someone
to return it all to me and say :

this ticket is not for me even though it is sold to all..
It's just this train does not have a place for me
so I cannot travel...

Love "Love of Siam"

Can someone please tell me what the lyrics mean?

Kop koon ka (did I spell that right?)!