you're not all american right?

USA is called America because it's shorter. Lots and lots of other countries have shorter names that they are commonly referred to as rather than their legal names.

Therefore, its inhabitants are referred to as Americans. If going by the popular meaning of the word, no. Canadians are not Americans. However, if you're looking at it from a difinitive point of view, you could say that anyone born in or legally immigrated to North or South America is an American.