Recently my best friend Aliye informed me that I have 122 days until I touch Australian soil. Its it wrong if that thought terrifies me?

I left Sydney Australia on 21. 1. 2006 and moved to Denmark. Since then I have created a life. A system. Then to be shoved back into my aussie world and away from my danish world is something I cant comprehen. The world I left consisted of english road signs, english magazines in the doctors waiting room, familiar sights, long distance travel for an ice-cream, bright coloured plastic money and no subtitles on the television or movies.
Dont get me wrong, I cant wait to see and experience these things again but what about the things I leave behind. The relationships. The culture. The system. My danish life.

How can you leave one life, create another and then just leave and return to your old?