(1) Impress her by dressing
Try to look and smell more attractive, taking care of your grooming makes her feel that you are mature of taking care everything. you have to pay attention to the style of her clothes, and try to wear the same style of clothing, then she will start attract towards you. Also pay particular attention to some areas:
Wash your hair, soap up all over, and rinse off. Use a nice smelling shower scrub as well, something not too feminine, but not too masculine either, maybe try a smell like mint, or lemon.
Keep your mouth clean. Brush twice daily, use breath mints and chewing gum which will help in the middle of the day. Manage hair style by shaving daily. trimmed your beard.
(2) Be polite
treat her with respect, which every girls want from their boyfriends. made her feel that you do respect every girl but not only her. Say "please," "thank you" and "you're welcome."
don't curse or say anything crude in public.
(3) Think before you speak
Everyone in this century slips up and says stupid things, but you have to try your best to limit it when this girl is around you . think carefully about your word, before you are going to speak.
never talk with other girls infront of this girl. never Discuss about the looks of other girls in front of her, which will make you seem shallow and fickle. make her feel like that you are attracted by her only, which bound her to think about you and your character. never insults or put other people down, in front of her, even if they're meant to be funny.
never tell dirty jokes.
(4) Pay her a sincere compliment
try to praise her. you should say when you're around her is a nice, genuine compliment.
Talk of what you like best about her. that could be her smile, her laugh, her intelligence. Smile! Keep eye contact while you say it, too.
Pay attention to how you word it. Instead of saying "That's a pretty dress" or "I like your outfit," say "You look really great in that dress." Compliment the woman, not the article of clothing!
(5) Make her feel special
try to do something, which let her know that you think she is an extraordinary person, and it will be definitely notice by her.
Do not ignore her. If she texts you, text back soon. If she wants to talk, talk with her.
always try to help her in every situation.
Try to talk or discuss about your common interest because girls are more comfortable when they talk about common interests. Ask about her interests, hobbies, favorite books, music, etc. If she asks you a question, answer it in a few, short sentences. And this will engages her in the conversation.