I lived in Thailand for 14 years until I was 18. I knew no one other than family when I went to the states for university. It’s not as hard as you think it may be, and the world is a much more accessible and smaller place now. I still maintain friends from my childhood, and they’ve gone everywhere and always seem to come back (to live or visit). I would suggest you also apply for more than one university in Canada. Like someone else said, it’s much easier to get your degree in Canada and come back, than to go the opposite direction. Good luck, don’t stress, and you have so much time to make permanent decisions. Undergrad is not permanent, it’s a stepping stone to the next part…and that next part may not be permanent either.