I'm sure by now that you have noticed I am, as ever, a practical woman.
I have no wish to make my roommate uncomfortable, as I am sure you don't as well. But my short hours of sleep and tendency to sneak about are not exactly conductive to a high degree of privacy.
Please do not take this as a proposal for marriage or that I wish to change anything about our current arrangements besides comfort of all involved parties, but co-habitation is the easiest, most forward option.