First of all, it depends on the type of girl.
1.girls like it when your sweet and shy.
2.DO NOT act cool.
3.always tell a girl she is sexy.
4.NEVER EVER talk about ex-girlfriends or other girls.
5.dont "keep girls wanting more."They will lose
6.dont give girls the feeling that you will call them
7.make her feel good bout themselves.
8.when a girl gives you a complement, give her one back
9.if the girl wants you to meet the parents and you aren't