lol, if we were living together, tura would have put me out on the street and changed all the locks
When it comes to living together, this is a good argument for having your name on the lease/deed. If yours is and his isn't, he can't change the locks....or call the police to inform them of a trespasser on the property.
My brother at college is going through the aftermath of a rocky break-up right now...only he's living in the same house as his ex through the end of the semester. It doesn't seem like fun times.
When I was working at Melrose Hall, a couple of the other RAs got together and later broke up. Staff meetings became a real joy, since they were held in a room that only needed to (and could only just) accomodate eight people. Icy stares, occasional outbursts, and awkward pauses were guaranteed on a weekly basis for most of spring semester, '07, exacerbated slightly by strategic and opportunistic seat selection. Yes, keeping close quarters immediately after a breakup doesn't help with getting over it or moving on. Depending on the people involved, though, it can be awfully entertaining for onlookers.
As to the topic, if he's not your friend, don't put him on a list that labels him as such. Also, maybe put a little more trust in your personal judgement than the annonymous advice of laypersons/strangers on the internet.