Maybe? Probably. But in her own mind, she is/was all those things, so she likely wouldn't be thinking about providing proof to back it up.
I remember the scene where she and Jeanette ran into Kate and her mom after aerobics, and she - Cindy - acted toward the mom just the way Jeanette acted toward Kate at the mall: goofy, hero-worship, giddy just to be talking to her. This also makes me think she's re-imagined her entire high school social life.
Oooh - what if she saw that Jeanette had the chance to be popular, the way she never did, and had something to do with Kate disappearing