this girl, HB8 texts me back and forth occasionally.
usually its me texting first but she does reply a few times VERY quickly, and then after awhile just stops. Shes done this maybe 2-3 times, and although you may suggest that she's 'just busy' shes on facebook making comments on people's stuff when she could be texting me back.
then, she opens me in person regarding the info she didnt reply me with like "what did you say your fave food was again?"

what is this chick trying to pull?

I think she is trying to play H2G but she's attracted to you so she can't put you out of her life for too long. Women do it all the time , they leave their phone for days with a text message and then all of a sudden they text back more enthusiastically than ever before. It's just part of their game so they don't look too easy.

I would just recommend not to text her if she didn't answer your previous text IRL/Phone. You will look needy and that's one of the biggest turn offs. Don't reward her with another text if she didn't answer the previous one to your liking.