The he usual words of wisdom from Quoll! I can relate to this thread, first to the OP, we nearly chucked it after 18 months, back in 2009. We came home for three weeks and I nearly didn't return, so miserable was my first 18 months in OZ. But, by a quirk of fete myself and my daughter got very bad ENT infections and couldn't fly, I not only didn't enjoy my last week of couch surfing and wanted to get "home" to OZ , we decided we we would stay for citizenship and in The ensuing three years life took off for us and we started living the life we were expecting. We came home, UK, again in November / December 12, this time I realised things had moved on too far, and I had been deluding myself in my pining for England, I didn't like it one bit and made up my mind that we would never return to live, and returned to Australia with a new zest. Not long after that the wheels came off, details I can't go into here, one year later we found ourselves back in the same house we had lived in for eighteen years prior to emigrating, and now I am working with the same people I worked with ten to Fifteen years ago! It can be really depressing ( no well meaning advice needed at this juncture thanks), I can fully concur with Quoll, you leave scars, and a lot of resentment, we saw more of family and friends in our two visits home than we have in the eighteen months we have been back, and as for my colleagues still talking the same drivel now that they were 15 years ago, now that is depressing.
Once more for good effect ... No advice please!