As scylla mentioned above, you have to get married or live together for 1 year before you can qualify for PR sponsorship.
There used to be a fiance sponsorship some time ago. But they removed the fiance category from the sponsorship. Not sure when they did this but I assume they removed this fiance eligibility due to widespread abuse and fraud, probably landing and then the fiance/ee skipped town to marry their boyfriend/girlfriend from their home country bring them to Canada.
Screech339