Approaching and you being the chooser is the most powerful thing you can do. you have the power to get any girl wether you working in subway or are a ceo.
That's what we call the true attraction. And for that you need to approach to them too.
For example:
If you like a girl then go and hangout with her close mate. Talk to her less than her mate but always say the good words about her. Tell her friend that she is this and that. Her friend will definitely share it with her mate but in front of her give an attitude that it's nothing important, you just said to her mate.
Treat her as if she is the best in the circle but when she comes to talk about it then don't give her much space, pretend to be busy with you own stuffs. This will make the girl curious and more desperate to know actually what is going in your mind. Don't be predictable for them.