Personal space is definitely needed and like a previous person already mentioned ^ Why don;t you jsut tell them what you posted here?
My husband and I enjoy our seperate time apart. its lovely. even as we speak he is playing Call of Duty BO2 with MY sisters in the living room, as I sit here eating toast browsing the internet. But it is sooooo nice. Its even better when our boss gives us different days off(we work at the same place, and its not bad at all XD)) and I get to clean and organize things around oru bedroom. <3 SO YES Make it firm that you need personal space to attend to your own well being and CAREER.