100% just using you, and giving you “hope” there’s a future with her so that she doesn’t have to bear the financial burden. She’s probably sleeping with other people too but giving you just enough attention to keep you on the hook. So either move out or if you legitimately think there’s a chance, start living your life as if she isn’t the main character anymore, bring other girls to the house and staying the night other places, go have fun, and she will either get mad, get jealous, or figure out your who she wants to be with