AITAH for secretly cancelling my best friend's (16F) university housing after discovering her disgusting pattern of using "smart girls"?

I (16F) have been best friends with "Vika" (16F) for 3 years. We met on our first day of college (vocational school) and instantly bonded. To give some context: Vika isn't as academically smart as I am, but she is definitely the "pretty friend." I’ve never had an issue with this, and I genuinely loved our friendship. Or so I thought. Lately, I’ve been having this nagging feeling that I’m being used, but yesterday it felt like the scales finally fell from my eyes. Since summer break started, Vika completely ghosted me. For two solid months, she barely replied to my texts because she got a boyfriend. Honestly, I tried to be understanding—people get busy when they're infatuated. But yesterday, we finally hung out at her place, and the conversation shifted to her past. Before me, Vika had another best friend in school, "Natalia." Turns out, Natalia was also the "smart one" who constantly helped Vika with her grades and homework. Vika casually laughed and told me that Natalia recently tried to reach out to her. Vika’s response? She blocked her everywhere and forced all of her sisters to block her too, saying, "We're not in school anymore, I have no use for her, so we have nothing to talk about." Hearing this made me feel sick to my stomach. I felt so incredibly sorry for Natalia, but more than that—it hit me like a ton of bricks. I am Natalia. Vika did the exact same thing to her that she is doing to me now. Here is the kicker: in two months, we are supposed to move away to university together. My mom is currently doing all the heavy lifting, pulling strings, and arranging housing for us. Vika is 100% sure that I will just fix everything for her and we’ll live together. She is so confident in this that she didn't even bother to check in on me or the housing situation for two full months. Other girls who are entering the same uni have told me straight to my face that Vika is just using me as a free ride and an academic crutch. I am completely checked out of this friendship. I want to drop her, tell my mom not to include her in the housing arrangements, and let her figure out her own life and accommodation for once. But a part of me feels guilty because this will completely screw up her plans right before the university starts. So, Reddit, AITAH if I leave her to deal with housing on her own?