If the gods are Greek, then Mercury should actually be named Hermes. Mercury is the Roman name for that god.
Harvey tells his girlfriend Morgan that he broke up with Sabrina when he found out she was going to a different college than him. That would be no reason to break up with Sabrina, since Harvey is now dating her roommate Morgan, who goes to the same school as Sabrina. Even Morgan, being as dumb as she is, should have picked up on this and called him out on his lame excuse.