Pursuing a hit: Any advice?

I have been testing the UF test pack for a while now. While unfortunately I haven’t had time to actually post a lot of my results, yesterday involved a a couple of nice hits and potentially a big one, given the setting I was in. The full report is in the following post in my UF pack thread:

But here’s a summary of the hit in question:

I had been working on school work all evening and still had a bit more to do and so I decided to grab a macchiato and snack for a little break and then get back to business with renewed vigor. The girl behind me in line was one I had seen before, a pretty brunette who always dressed semi-modestly (as compared to half the girls on campus). I had smiled at her a few times when I would pass her on the way to class or my dorm, and she always smiled back. A little while before this, perhaps three to four hours, I had applied one spray of MX395, split between my wrists and neck. I placed my order, attempted to pay with my school ID (linked to meal plan) and found out I had insufficient funds on it. I asked the girl behind the counter if I could run to my room and grab my debit card, since I had forgotten to return it to my wallet. She said it was fine (all the coffee shop girls know me and are friendly with me) when the girl behind me offered to pay for it. I was taken completely off guard. I asked if she was sure and she said it was no problem.

She asked the girl behind the counter how much it was and didn’t even blink when she found out it was about seven dollars, which, while not absurd, seems a pretty hefty price to pay for a relative stranger’s coffee, pastry, and tip. I asked her name, gave mine, and shook hands. Unfortunately, I had school work to return to, and was also completely flustered for some reason, so I thanked her again and continued on my way. Now, I’m usually pretty comfortable around girls of a certain type. I can carry an interesting conversation about nearly anything, and am apparently quite charming with a tendency to be flirtatious without even realizing it (my ex-girlfriend insists that I flirted with almost every girl I talked to, and this has since been confirmed by other people, but I never really noticed it.) And yet, somehow this situation has me at a loss. I feel I should pursue this, at least so I can find out if this girl is my type. Even if she’s not, it could still be a good friendship, and friends are always nice. Finally, if nothing else, she paid for my dinner, so next time I see her, I can’t just smile and keep walking. There has to be some change of response. So, what do I do? I’m not sure why I’m having so much trouble. I think it’s just that I can usually tell where things are leading, whereas this took me completely off guard and I didn’t have time to gauge what was happening afterwards. What do you think?

If I may say this is a case of you having a girlfriend, so when you end up talking to other girls they can sense that you’ve got something that’s intriguing to them.

Anyway, just say hi next time. Can’t hurt