hey, i have a weird problem.
I am a very outgoing guy, and not shy...I could start breakdancing in the middle of the mall if I wanted too and I love picking up chicks at the mall. I have no trouble opening them using opinion openers, however...I can tell the girl that I'm macking on is interested in me but then shyness hits me and I cannot even number close b/c I don't know how...

I was thinking of saying something like...
"is it just me, or are u feeling me?" blah blah "we need to hang out, gime me ur #"

This sounds a lot like the problem Style had when he first started out. Approaching is good for you, then you lose the hook? Or you just can't seem to hook her?
Either way, as soon after you open, drop the opener. Never try to thread with it. Go straight into something else. Once you grab her interest with threading and getting her to feel comfortable, you can then assess her IOIs. Playing with her hair, rubbing "lint" off her shirt, eyes changing colors, lips engorging and getting more red, licking her lips, tilting her shoulder in your direction, popping out her breasts at you, her foot placement towards you, her leg revealed if sitting down, etc. Once you have a good number of these, just go for it. Kino her, work it up, and then K close.

B

So if your having trouble simply number closing, there's a lot of clever ways you can obtain her number. How bout..

You "Well I had fun talking with you!! I'll call you tomorrow ^^."
HB "But you don't have my number!"
You "Oh Yeah!" (Take out a pen)

..or...

You: I can't wait to _____ together!
Her: Yeah!
You: But to ensure this happens, I'll need your number

..or...

You: So what steps can we make to ensure we continue this fun conversation?

Or just "Can I get your number?" or if your feeling less confident..

You: Do you text?
Her: Yes!
You: We should text, whats your number?

There's a lot of methods, these are really great starters.