Hey guys so I've had my eye on this girl for a while. We didn't hang out that much last year (junior year)... We only hung out in class and in field trips. So basically I think she's in to me because her friends keep telling me to ask her out. I don't talk to her as much this year because we have no classes together, but I see her almost every day when I leave for lunch (this is basically the only window I have to go talk to her). We take a little bit but it's basically just passing conversations. I don't have her number, Twitter, snap, etc.

How should I ask her out? I know just going for it is obvious, but we barely talk so she might get scared off.