If your legs are crossed and hand is over the mouth, the girl will unconsciously think you are hiding something.
This phase contains the most cherished memories that make us remember for a long time, even until the last of our life.
If she is a beautiful girl, tell her your feelings for her.
Nevertheless, it is important not to lie when it comes to giving a compliment because a girl often knows what she truly is worthy of being complimented for and will feel a little bit patronized once she knows that you are not telling the truth. It is a great way to enhance their comfort level with you without appearing too close.
Pressure will not get you anywhere when it comes to attracting a girl.
Drop the pressure so you can do more, and push a girl into more than what she feels comfortable with.