[ShadowDancer]

Yes, that's what I was referring to. Because frankly, you will never, ever, ever know someone totally until you live with them.

[Just another Joe]

Living under the same roof without having a sexual relationship is fine. It allows you to get to know the other person without the peril of allowing yourself to get, 'too close'.
It allows you to see them at their best, and their worst.
Especially if it's for a number of years.