Memoirs of a Rucksack

When expat life finished and you need courage to go back "home" - At 20 I moved from my small town in Australia to the big ol' London Town. I knew nobody, and was a quick decision. Never once I was scared even though everyone said "how brave I must be". I had the best time of my life. Now, reality sets in as the real hard part begins. Moving back "home". My visa is up and I've had to say goodbye to expat life. Why is this the hardest part?