Be sweet, hold doors open for her, and just be chivalrous! Every girl wants a guy who is polite! That will score you major points with her :) good luck! oh and also, text her first, instead of waiting for her to text you. girls feel like their being annoying if they always start the conversation. and if she does start it, ANSWER HER!! it is soo annoying when you really like a guy so you try and talk to him but he doesn't respond. then you really feel like youre annoying and he doesn't like you!
Find out who she is and what her general interests are. Then cultivate a genuine interest in some on those things that she enjoys. Use your newfound common interests as the subjects of conversation. Also, always LISTEN and remember the things that she shares with you about herself.