"- Right. I...think I should go for it." It seems really cowardly to run and hide the first time a boy likes her, even if she's incredibly confused about why he likes her. Also it'll help her survive and her mother would approve of that even if she wouldn't approve of Shannon jumping right into dating a boy.
...Also she's still feeling out of her depth. "So, um, what should I...actually do? He hasn't, like, asked me out or anything, should I just - be friendly to him and wait to see what he does? Or do I need to be more assertive than that?"