The easiest way for you to get a visa is application through fiancee sponsorship. In this regard, you will be given an immigrant status after the consummation of marriage.
Temp resident visa as visitor, maybe be another of your option to get to Canada. Present documents that will establish strong ties to the Philippines. Bank accounts in your name, properties, car, certificate of employment with approve leave of absence, travel histories. Affidavit of support from your bf may or may NOT be helpful. However you can show it as evidence at your risk. In conclusion, the only way to know is to apply.
Good Luck