Congrats on your decision to shave your legs! As others have stated, it will be an exciting different feeling - not only on your legs, but in your mind. You may think "why did I wait and what next should I shave"! Continue to do what YOU feel is best for you at the moment! If your GF is not giving you positive re-actions, it is time to move on. IMO she will only hold you back from enjoying who you are!