"But through the window you can see
the other side, the happiness
and the free."
I suggest you change free to freedom.

"You can see it but
you can't touch it. That is the worst
torture of all."
I love this part, mainly because I know that feeling.

Great piece, really powerful. It flowed really well, in my honest opinion. The word choice is also great. Really enjoyed reading this. 5/5 Keep writing.