TheBlackSheep's advice was right on. I would add that "feeling the chemistry" is helped along when the other person feels it too, and a good way to hint that you want to feel it from them is to act it.
Maybe that's not true, though. Been a long time since I've put that into practice and my memory might be fuzzy.
Finally, the way it worked out with me is the fella didn't feel the same about me, and started showing interest in other girls, so I had to forcibly cut out that part of my heart over Christmas break. That's a good way to tell (if flirting doesn't have immediate results) if it's going to work.
Oh, this question brings back memories...awkward hand pats and flopping flirty comments...good luck, Mr. Triple-T. She's probly waiting on you, so take TBlackSheep's advice and (if you happen by) let us know what happens!
This whole thing just made me smile. Did you go for it with the elbows?