The body language you exhibit is the one thing that factors tremendously, whether you are dealing with a shy or outgoing guy.
A shy guy is usually looking for lots of positive body language cues from a girl so as to develop the courage to talk to her and ask her out.
And even this isn’t guaranteed.
Nonetheless, any chance at getting a shy or introverted guy to ask you out requires that you make him feel as comfortable as possible with the idea of approaching and talking to you.
Since human beings are visually stimulated when it comes to who they would be attracted to, they assume that an attractive person will have it easier with dating.
When they see you, there is an instant feeling that you have had a much easier time dating than they have, given that they believe you are more attractive than they are.