Very valid. I once had to move out because my roommate brought random guys over and did things in our shared spaces. Personally I was assaulted so I a not comfortable with any strangers in my safe space while I sleep

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Well as being a guy its uncomfortable to walk in someone’s room and finding another girl idk of. But if its makes you uncomfortable don’t wait. say it out loud its for your safety and it comes first doesn’t matter if its appropriate or not. And things can escalate before you even notice so yeah just say it straight to her and set boundaries. If she doesn’t agree i might consider installing hidden camera and voice recording so you have something to prove in case of unpleasant things happens iykyk

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