This year, I'm 17.: To fly by myself

To come to another country without my parents, how can I make such a big decision as before that I haven't even travel to another city alone!
2013/8/14, the day I left Shanghai, I think I'll never forget it, as I was nearly cry out before my dear sister and my parents, I had to admit that I was afraid finally. I just didn't want to get into the customs as I knew once I stepped into I had no choice to get back.
But it's the way I choose for myself, I can't regret for that, though I can never guess what it will happen after the plane landed off.
WHAT is it that scares me a lot? To be independent, or to try to stop my native language and begin using English all the time? No one knows, and I don't want to care about that.
Yes, now I'm in Sweden, in a country that is so far away from China that most of my classmates haven't even heard that before! I will be an exchange student for ten months, it'll be a challenge of course, but let's just wish what will happen after ten months, the butterfly will fly by itself!