Best drama/ story I have ever seen, I wish I also can feel this type of fantasy, but it's imaginary, it's never gonna happen,but if it's possible in anywhere in universe I'll definitely wants to experience it... They didn't show us the real world dimension after she gone, they just show her own world (dimension), she met him but he just looks like him, it's him but in another dimension, so he couldn't recognise her, but what happens in the real dimension?
Maybe this is called tragedy!! The writer know how to control audience emotions.