What's the difference between a frenemy and a fake friend, if any?

There is no difference between the 2. Both terms means the same: a person pretending to be your friend, whilst at the same time they're nothing but your enemies. Beware such people! Always be a true friend, never a fake one. Some people they obviously pretend too well to be your best Friends for anyone to suspect they're not even remotely interested in you, ou anything that toi say ou do. Fake Friends are everywhere these days, even here, on Fanpop, so be extra careful whom do toi call your friend & whom do toi trust completely. People should earn your trust & your respect first! I learned my lesson the hard way, on all social networks I ever been, including this one. Surprised? Don't be! People just pretend to like you. They're just using toi for their selfish goals, but solehow I believe toi already know that par now. Remember, frenemy is part friend part enemy, but in fact they're just another enemy wearing a disguise.