Where are you going to live? Do your parents know of your plan to move to the US to be with your boyfriend? At 16, you're not legally old enough to apply for a visa on your own AFAIK, you'd have to have parental approval first, and you'd have to have a place to live, and means of financial support, and show proof of that to the Consular officer who processes your visa. I think your parents would have to attend the interview with you by the looks of it.
I'm not even sure there are even student visas available for high school, unless the high school you are attending is a specialized academic school with courses not available in Canada.
Here's some info on student visas here
http://www.us-immigration-attorney.com/f1.htm
You will likely need to consider holding off in living with your boyfriend until at least college.