I went on a site to specifically pick up one girl that I saw. I told her that know one on that site had interested me and she had everyone beat, I asked her to check out my profile to see if she was interested.
She says "Im interested " then tells me she gets back from spain on sunday (4-1-12). On sunday I ask for her number so we could figure something out for this week. She ignores that and asks about my headline that mentions I'm looking for a girl that will believe anything, obviously a joke. I tell her its just a joke and all she says is "oh i see."

I don't know what the hell happened. I don't want to come off as some pushy creeper, where do I go from here?

She obviously doesnt feel comfortable giving out her number right away. Just talk to her like a human being. Be your best self and when you get enough IOIs try for her number again.

Ok cool, thank you. This online picking up still feels a little unnatural to me. A lot of things about this girl show that she's a bit shy (not much info about herself, short answers), is there anything you recommend that I should say specifically to get her to open up a bit?