How to tell someone that I do NOT want them to be in a suite setup with me in college?
So there is a girl that I've known for a few years now, and I used to be cool with her, but over time I've started to become annoyed by how she acts and treats other people. She is part of my friend group, but I personally try to avoid contact with her because she is entitled and refuses to take no for an answer without pitching a fit. We're going to the same college next year and I found another roommate specifically to tell her that I could not be her roommate, but she has applied for the same suite-style housing as my roommate and I, and is now trying to ask what suite we're going to select so she can be our suite mate. Since we're going to be in the same housing building, and seeing each other in classes, I don't want to cause her to flip out and be weird about it to me or my roommate (who also knows her, but agreed that we should not suite with her). We've been politely declining her offers to room, but I'm at a loss. I'm considering just not responding to her message asking what room we're going for, but that's too low for me to stoop. I guess I just need some help on how to word a message to her that gives a reasonable and non-drama-inducing reason for her to NOT suite with us.
To be clear, I'm okay telling her no or rejecting her, I'm primarily trying to avoid causing ripples in the friend group or making her get all pissy and annoying all of next year.
UPDATE: I told her that we had it figured out already, then said she should talk to other people to find out what their plans are. Luckily, she didn't seem to get too upset, just said "okay lol" and started asking about other stuff. I chose not to disclose any information about where we will.be housing because I don't want her to get any ideas.