Is this appropriate?

I was a TA last semester and got along well with a student of mine who was around the same age as me (22). To get it out of the way, yes, I’m attracted to her and I’m almost positive she’s into me as she would stay after class to talk to me, sent me a kind thank-you email after the semester, and would blush whenever I called on her in class. My talks with her while she was my student were entirely professional and academic and I did not grade her any differently. Now, that she’s no longer my student and she never will be again because she’s graduating this coming semester, I was thinking of asking her to get coffee once school starts back up. I checked my school’s handbook and relationships with students are ok as long as they are not your current student, which she is not any longer. I’m also not worried about it affecting my academic relationships with other grad students and professors because we really don’t talk about our personal lives together and there’s really no way they’d find out. Would it be appropriate to ask her to get coffee with me? If so, what’s the correct way to go about it? If not, explain to me why it’s not appropriate to do so.