So, there's this girl I met a couple of months back in a drugstore, where she works as a cashier. Everyone tells me she's into me, and it got in my head. 

I can't recognise flirtation for the life of me, since I'm seriously socially stunted. 

Part of me thinks she's nervous when talking to me because of social anxiety, because that's a thing I can relate to. 

Anyway, since that first day, I've been obsessing about her. I've spent more money than I should there, just to see her and work up the courage to ask her out, or ig, or whatever. Never did. Always chickened out. 

I don't know how people work. How they do things like this. 

What if she's NOT into me? What if I make an absolute fool of myself? What if she IS??? 

I would appreciate some tips on how to actually ask someone out without looking like a total creep. Or how to get over this.