Be cool. I really don’t have to tell you that, because what you’ve already told us indicates that you are on a high level of composure control.
First off, she is going to see a movie with you, not her various other guy friends, but you, alone. This was not a mistake on her part, she intends on being there with you, alone. This is literally speaking so far, but still positive.
Watch for her touching things. If she touches her hair or face a lot, that is good kinesthetically speaking. If she touches your arm, shoulder, or back, count this as a really positive sign. If she puts her mouth on your penis, take notes and pictures if possible.
Some women will really, really want you to kiss them after the first date, they will however, give zero signals that might lead to your discovery of this fact (damn you Heather!!). Other women will also give zero signals, and will regard you as one step above a rapist if you try to kiss them (damn you Jennifer!!). She really wants to know if you like her, she just won’t tell you in what way, or to what degree she would like you to show it. Suffer these games quietly, they posses boobies, and other things.
Be a gentleman on the first date, and doing so on the second isn’t usually a bad thing. Some girls like early pressure, and some think that it’s creepy, use your best judgment.
Be a little bit more “touchy” than you usually might be. Don’t misinterpret this. This means any contact that a female might expect from a total stranger. You can put your hand on her shoulder, but don’t leave it there for more than a few seconds. Same thing goes with lightly touching her back, do so ever so carefully. Feel free to escort her across the street by presenting your bent elbow to her, but don’t stress if she ignores it. Holding or touching her hand is usually a watershed moment, unless the situation calls for it, save this for a really special time.
As was said earlier, ask her if she would like to “go on another date”. This establishes your intent, gives her an out if things aren’t what she wanted, and gives you a HUGE green light to initiate actions that make it clear that you’re interested in her if she says yes.
Dating is by no means a science, but science can be applied to it in doses. Kinesics can be useful at times, but people occupy both extremes of any given continuum, and really throw off any meaningful “solution” to such a problem.
Most of all, don’t be afraid of what you might think of as a failure. It’s not a failure, it’s a learning experience. The more studying you get in, the better your chances of acing the final are.
Good luck, and be yourself.
