Thank you all,
Here's an approximate tranlation :

You dream of someone other than me

When I see you there,
hoping you'll turn around,
I would not like
let your memory fade from me.
I have to accept it,
my arms are too small for you.
Even if my heart has place,
you dream of someone other than me.

I stayed a long time
like a poor silly fool
waiting
always so vainly.
So here I am trapped
bewitched by a moment.
Charmed by your spells,
I have always been willing.