Just want to clarify several things:
1. First, you are still so young, withour any burden, or limitation. And you haven't got your own business, or your senior positions in China, so, what should your worry about?
2. Since you are here, you have more chances to evelop. If you still choose giving up the visa, it's wasty. Though you didn't pay much for that.
3, There are so many young and good girls in Toronto, in Canada now. Many new Chinese, or oversee Chinese girls come here by themselves.^_^