Watching shows over and over are usually a sign of feeling anxious about life. Watching THIS show over and over almost definitely means that you’re finding things particularily reletable, and watching it is a was for you to process and understand such emotions.

Definitely watch it with her, ask her about it, why she likes it, which character she likes the most and try to remember what it was like being a teen. I was a depressed teen, and I got out of it, but I sure wished I had a parent who would talk to me about how much it sucks being a teen.