Girl at School

[Dimwit1600]

There's a girl at my school that I like. She's a Sophomore, which would make her a year older than me. I only met her this year and we only have one class together, so I don't really know her, but I used to talk to her in that class everyday. Now we don't really talk because she is in a different "group" (group meaning people you sit with and help each other with your homework; my geometry teacher has issues just to let you know). How do I become a better friend and get to know her more. Do I just start saying "hi" in the hallway and take it from there. I don't want to sound like an idiot and act like I'm obsessing over her. But I like her and I want to be her friend so I can take it from there.