<human>: Can you provide a brief rundown of the text in within 3 sentences?

I am a 20 year old male attending uni. 

Last night, I was browsing one of those "free and for sale" sections on FB for my university and I see a post by a girl selling some leftover food supplies that are still edible (Maruchan ramen, Verve energy drinks, etc) and since it's finals week, I figured, hey. Why not. I could do with some backup. I leave a comment saying I can meet at noon the next day for the transaction and she agrees.

Fast forward to today, I meet her at the time we agreed upon and I realize that she's much cuter in person and this totally caught me off guard and triggered total SAP mode. Her voice was beautiful and her entire person was a vision. I felt like I was living out a fantasy I've had on the verge of falling asleep but have no recollections of. I proceed to pay her and we exchange some lighthearted conversation about nothing in particular; everything transpired pretty smoothly and we go on our separate ways.

However as I was walking back to my car, I found myself replaying the conversation over and over, thinking about how I could have done things differently. Chances are that I'll never run into her again; I don't dorm and our campus is relatively large. I wish I had somehow lengthened the conversation and maybe asked her to get a drink. I am not always so clueless!
What should I do Reddit? I want to see this girl again, but I hardly know her at all. The facebook conversation we had only consisted of a few lines of back and forth. I could easily use that to get into contact with her again but how do I do so without seeming like a creep? To all of you out there, what would be the best thing to do? I ALMOST sent a message saying something along the lines of, "hi again, this is kind of random but I thought you were cute. care to get a drink with me sometime?"

I know that I'll probably not see her again so what do I have to lose? Help!
<bot>: Arranged a brief meeting to buy food items from a girl via a FB page advertising "free/for sale" goodies, ended up deeply infatuated and would like to see her again. Help?