Hi Amc24 and welcome to Beyond Blue
It's good to see you've found your way here. Our community is very caring, friendly, non judgemental and supportive. Many of us have different ways of dealing with our mental health issues so you may get some different answers.
Life at 15 can be a very confusing time. Everything is changing, your body, your mind, the things happening around you. I found at that age, I really didn't know what I wanted. It was also an era when I had little choice because I was female, young and had strict parents.
You talk about missing the UK. What is it that you miss that you don't get here in Australia? And what is it that you don't like about Australia?
I guess my thoughts asking these questions of yourself may help you to think through your motives for moving. It will give you added support when it comes time to talk with your family and friends.
It's hard to know whether your family will react negatively or positively. I would say it depends on the current relationship you have with them. For example are you close? Are you the only child? Do you do lots of family things together? Maybe think through some of these. What I can say is - I'm sure your parents would want to be confident of - where you were staying, who you were staying with, what school you were going to. That's all the risk and safety issues. Then of course there is the love they would have for you. Can it stand the distance? With sKYPE and other online face to face chat programs it's not such a big issue I would have though. So you could still talk to them about those personal things that cause you anxiety or depression.
I don't have children so I can't really say much more. But there are many parents who post here that I'm sure will give you their views about having their child go overseas to live at 15.
Not sure how much this has helped you amc.
Keep reaching out if and when you want to.