(I'm a college student) Should I add a potential manager on Facebook?

So, A few weeks ago I applied at a Gamestop that had a friendly manager who seems to enjoy my company when I come into the store and make smalltalk. She’s a pretty nice, mid 20’s and friendly person overall. I stopped by today and chat for a few minutes and to ask how my application status was; to be told she doesn’t know if she can hire until mid May- ok, cool.

She also said I was one of her favorites (customers) since I was friendly and yadda yadda and a lot of stoners tend to come in. I asked if she remembered my name and she joked if she could cheat by looking at my card info during the transaction.
As I was leaving and telling her to have a nice day she said “You too, ****.” Which I’m probably reading too much into but she also didn’t card my ID; which I would probably use as a lighthearted potential conversation starter.

I’m wondering if I should add her on Facebook and get to be buddies with her- or if adding her on Facebook would be creepy and hurt my chances at the job.
Thoughts?
[I’m putting this in the general section simply because I don’t want to start a flame war about Gamestop being like cancer to the game industry]