How many times have you approached a good looking girl for the first time, and quickly got shot down or had a half hearted conversation with her you knew was going nowhere? Think about how many times any decent looking girl is hit on any given day and you can see how they may get defensive or just not interested.
They just do not want or have the time to talk to every guy that comes up to them.
What you need to do is learn how to get past the front they put up so you can have that decent conversation with her.
A lot of these girls may come across as stuck up but most likely they are not, they just get tired of all the guys approaching them.
So what is the first basic thing you need to do to break the ice and start a decent conversation.
First is do not give up, if you do get shot down try again.
Next time use a different approach because you know the last one failed.
Make the girl laugh at something, laughter is a good way for someone to loosen up.
And think about your attitude, don't be a wimp.
Be a positive person that shows confidence in yourself.
This in its self can go a long way.
Be aware that you may be tested by the girl as you are talking to her.
It could be to see how you react to something she says or does.
It's her way of weeding out the useless guys, so if you are confident in yourself you can get past these little test that thrown at you.