Quote: When I say "that sort of emotional entanglement," I mean the sort that has the potential for sexual connection, in fact, that already has an element of sexual connection in it. THAT'S what distinguishes a roommate R from a lover to lover R.
No.
It is the level of intimacy that is going on in the relationship that defines the difference between roommate and spouse.
Intimacy *can* be expressed sexually. However, sex is not necessarily an indication of intimacy.
If sex was all that made the difference between roommates and spouses, then where would you place f*ckbuddies?