Yay to wine time!
I don't think you're the bad person, it's her behaviour which is in question. It's bull$hit that you're having to feel like this - tbh this is exactly what this kind of bullying does to someone.
Reclaim your power and be assertive with her next week. Imagine if it were your child in your position - what would you want them to do? How would you want them to stand up for themself?