"Best friend" voted for Tr*mp

I (26F) am openly queer and have been vocal about my support for Harris. My friend (21F) comes from a conservative household, but is pro-choice, considers herself an LGBTQ ally, etc. She has been in my home and celebrated Jewish holidays with me and my fiancee. Today I found out she voted for Trump.

I feel incredibly confused and betrayed. Based on her values, I always (naively) assumed she would vote blue. What hurts the most is she doesn't understand why I'm so upset over "just an election" and can't see why it's causing turmoil between us. For context, she has been very sheltered and she is a wealthy, straight white woman.

I value our friendship and I want to give her the benefit of the doubt that she's parroting her family's shitty beliefs because she's still so young and hasn't fully become independent. The most comfortable thing would be to go on as normal. However, I no longer feel safe with her and feel as though I would be doing my communities a disservice by continuing to associate with her.

To complicate things further, we are in a doctoral program together and sit next to each other every class.

What would you do in this situation?