I've been through a similar situation where a close friend staying at my place started using my personal spaces without asking. What really made it uncomfortable was when they started inviting others over, especially my boyfriend, without informing me. It felt like a breach of trust and personal boundaries. In my experience, the key issue is communication and setting clear house rules from the start. Letting someone stay rent-free is a huge favor, but it doesn’t mean they have free rein over your private belongings or spaces like your bed. Personally, I found it helpful to explicitly state what areas were off-limits and to discuss the expectations regarding guests. If the friend is respectful, they usually understand and adapt. When you come home and find someone in your bed, especially with a partner, it can feel invasive and disrespectful. Even if they claim they were 'just watching a movie' or 'chilling,' the location matters. If you’re feeling upset or like you’re 'tripping,' trust those feelings because your personal space was compromised. It’s important to address it directly with your friend, clarify boundaries, and express how this behavior affects your trust and comfort. Ultimately, friendship is built on mutual respect. If boundaries are crossed without remorse or understanding, it’s reasonable to reconsider the terms of that friendship or living arrangement. Setting limits is healthy and necessary to maintain respect and harmony in any shared living situation.