Most Helpful Girl
you should just start with small talk, ask her about her weekend, things like that. then when you get the courage, ask her about herself, get to know her, and then even ask her on a date where you two could just sit down and talk c: but get to know her, you never know what might happen
Most Helpful Guy
It doesn't matter what you talk about as long as you talk. Interaction is all you need to gauge whether you think she likes you back. Then eventually you ask her out.