Girls: what should I do if I don't see my crush very often?

Anonymous
There's this girl at college I kinda like. She doesn't seem attached to her friends and is pretty quiet, but she'd look at me from afar (especially when one of us were in a group of ppl), though when we were close and alone she'd pretend I didn't exist. That was last semester.
Now, this semester I did approach her (we have no mutual friends and I'm very shy), but we don't share classes anymore. The talking is fine: she smiles, looks into my eyes, tells me stuff, laughes, etc, and her behavior is pretty much the same (ignoring me when we're close and alone, though reacting possitively when approached, and looking at me when one or both of us are in a group), but since we don't share any clsses we only see each other like once or twice (at best) a week. All the talking we've had was one-on-one.
What should I do about it?
Girls: what should I do if I don't see my crush very often?
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