Deep down, most people don't require title and ceremony to validate their relationship. If your lady is asking for those things, it may stem from insecurities she's feeling. Why would she be feeling these insecurities? One possibility is that you aren't providing reassurance. How often are you showing affection towards the woman you love? Have you gotten into the monotonous pattern of lazily tossing off "I love you" as you both head out for the office each morning? Besides sex, how are you expressing your feelings? If your only expression of love can be construed as mere lust, it might be time to be more open when showing the love.