you should do something that is difficult like to devote a lot of time in creating something for her..something beautiful,like a big puzzle..but the best answer is to show you are in love with her every day!you know,look at her in your way,take care of her..if you do like her then you could do this!show her she can trust you..if so,she will get it!believe me...all it needs is time and love!good luck