I agree with IAMHOLLYWOOD....
frame the interaction as a casual get together, not a "date" cuz that would put unnessesary pressure which would case her to back away.
just knowing what you wanna do, where you are going at what time to pick her up and for bonus points, telling her what to wear, what you like... ITS GOOD!
so always lead the way and never say
her: so what do you want to do?
you: Im not sure, what would you like to do?
GAME OVER
her: so what do you want do?
you: tell you what, there is this great place that I really like going to, and you should come with me, if so, we go this friday at 7:00, and wear something cute, nice
her: really? what do you want me to wear?
you: surprise me
GAME ON!