Employee at grocery flirting? How to let them know I'm interested

An employee at a grocery has been awfully interested in me for a few months now, or so I feel strongly they are. They always go out of their way to hover close and greet/meet me at whatever checkout I go to, ask me how I have been and seem more keen than average at being as helpful as possible. She and I have also chatted at the bus stop after her work and she has even told me where she lives. I can't help but to feel compelled in telling them I am interested as I most certainly am but how do I break the ice carefully without seeming like a creep? Any advice would be wonderful.

Ask her if she want's to go for coffee or lunch one day