Unless you plan to change your wardrobe what is the point of trying to look one way to "impress" someone only to revert back to your natural self once they become emotionally invested in you. Naturally you want to dress appropriately for the event or occasion. (You would not wear jeans and a t-shirt to a 5 star restaurant). Being yourself saves everyone time. People are sick and tired of "bait & switch" tactics. Too often we hear someone say, "He or She is not the same person I fell in love with."
Ultimately we are all looking for someone who will love and appreciate us for who we really are. Always be true to yourself!