He says: "You smell just like my ex-girlfriend."
Your handbook calls it: Comments and remarks of a sexual nature that refer to a person’s physical appearance and/or genitalia
She calls it: Prelude to a restraining order
Why you're wrong: Are we talking perfume, pheromones...sexual odor? Either way, this is a clear indication that you want to be as close to her as possible, and in that special "It puts the lotion on its skin" way. Your wafting is optional, her overt disgust is a given.