Another effective technique is to gently bite your lip.
When you are in a location and spot a person that you want to flirt with, do not immediately go over to this person.
Stay where you are and continue talking and smiling with your friends, though periodically look into the person's eyes.
If you make a man your whole life, he’s going to lose interest because he will most likely feel smothered!
Remember, he fell in love with the dynamic “you” who has her own interests and passions who wanted to make him a part of your life, not the whole darn thing.
When you know that you have caught his attention, you may want to walk past him, looking at him again.