How do I talk this girl at her job?

There's rmthis girl that I really like. I have seen her at her job for the past month. She is a cashier at this cook house at m this waterpark. I don't even know this girl and I've never really talked to her. But I always order from her and Shea really nice and I always sit were we can make eye contact when I eat. Which we always make eye contact when I eat. I'm like in love with this girl and I always think about her but I don't even know her or even talked to her. It just something about her that drives me. So how do I talk to her and does she like me? I know she doran hate me because I've made her laugh before so ya.