No one has better instincts than you, as you will so handily prove today when you whip off the mask of someone who's all talk and no action: be generous when you reveal their true identity. Chances are they were just trying to impress you anyway. There are many mixed signals coming from a friendship you thought was solid: again, trust your instincts on this and consider that this person isn't always the best at communicating. Ask them what's up and get to the truth.