Yikes. I would urge you to call the police and file a complaint against him. The laws for stalking or harrassment can't be that much different in Canada than they are in the US. To be extra safe, please keep a log of everytime he approaches you, what he says, how he says it, etc. Just in case it needs ot be taken to couort Have some sort of formal log to write all these entres on, evenif its just a cheap steno pad. just be consistnet in your entires.