AITAH for wanting my housemate to pay more for the bills. We split them 50:50 but in the last 2 months my housemates partner has been staying each week 3-4 nights almost each week. Happy for them to use everything in our household. We usually split these costs of shared items and they are welcome to use. AITAH for wanting them to contribute to the household utilities. I feel like I’ve lost my space on the weekends with the shared living areas and I’m just being whiny by wanting something back. My housemate hasn’t been leaving to stay at their partners place. If they weren’t alternating I wouldn’t have mind but they just stay here and barely leave.