I was really looking forward to moving here for months before I moved but I had a nervous breakdown right before I moved and I nearly threw in the towel on the whole thing. But I went through with it, and took my chances. It took me ages to settle in but 5 1/2 years later, I am fine and thriving in my ''new'' life (not so new anymore).
The most important thing that helped me is to find things that I like doing. I found a job, made a few friends, joined a gym, learned to cook my favorite foods, all the same things I did back home.
Its never going to be exactly the same but as long as you make the effort, you cant go wrong. Good luck whatever you decide.