[She just looks up at Applejack through her bangs for a few moments, then sighs and drops her head again.]

I know. I know. Look, it's not that I want to leave you girls behind, it's just that...

[She pauses, trying to figure out a good way to put what she's feeling, until finally she raises her head and just gives AJ a wibbly face.]

I'm scared, Applejack. I'm scared of what they could do to you. They got to Fluttershy once already, and that wasn't even with them trying to get her! I can't stand the idea that one of you might get hurt because... [She wibbles, and her eyes drop again.] Because of me.