Wow my friend JUST RECENTLY had that problem except that it was vice versa. She made a fake girl and got kinda attached to this guy that went to our school. Problem is, he doesnt know the "real" her and she pretended to be a junior when she's actually a freshmen. I convinced her to stop logging on when he wanted her yahoo account. I dont think its "shitty" since everybody gets curious (esp when someones profile is private) but its a better idea to just be you. :]