What is a possible solution?

So myself and girlfriend broke up but we still live together for the next 3 months and she’s not exactly cool with the idea of just doing a roommate situation. One of the factors in the breakup is her controlling nature but she walks in on me in the restroom and I’m like wtf man roommates don’t do this it’s a invasion of privacy and she tried to use the excuse we used to be intimate but I was like that’s not acceptable you need to compartmentalize that was then and this is now

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What is a possible solution?
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