Can a guy really get a girl if she doesn't show strong attraction?

I work at this restaurant on weekends where I wrap sandwiches for customers, and this really hot girl was in line.I was taking a break at the time but when I saw her I got back to my post. So when she reached up to me I told her ” You are the first girl that actually made me get back to my post…you are better than my boss!” She smiled and took her food and left. Her body language however was like she wasn’t that interested in getting to know me better and I have experienced that with girls I generally try to hit on in the street or at parties and at the mall. I just want to know from the Fluther Players here what kind of techniques I could use to make my game better. What you girls have to say about this.