Ok, so me & a mate of mine went to a local restaurant/take-out to grab some dinner last night. We walk in, and serving us is a chick I went to college with several years ago. She aint' bad either, I'd rate her an 8, minimum.
Anyway, I have a bit of a general chat with her (what u doing at uni, exams, bla bla bla), my mate orders his meal, then I grab mine. While talking I notice she seeming almost nervous, she was fidgeting with her hands quite a bit, in particular. Then she proceeds to discount my order by 50% (my friend paid full price

) , I finish the convo off and go take a seat.
We were in a bit of a hurry so we ate, I said thanks, and we left. What I'm wondering is whether she is interested. I'm pretty hopeless with reading girls (hence I'm here improving!) but even my numb female-interest sensors were going off, and the other guy I was eating with independently mentioned that he thought she was giving off some signs while talking to me.
What do you guys think? If there is some potential there, any suggestions on how to proceed?
By the way, I never showed any interest in this one during college. I was quite a different person back then, and it wouldn't have even crossed my mind to try and go for her. Could count the number of times I'd talked to her there.