My H lived with me from BD in March 2011 through May 2012. To paraphrase Axl Rose... "It's been fourteen months of silence, it's been fourteen months of pain, it's been fourteen months that are gone forever and I'll never have again..." I just did that?
Okay so anyway, all I can do is to give you my experience. I was a mess while my H lived at home. I hated going home, every day. I hated seeing his vehicle in the lot when I would get home. If I got home before him, I hated looking out the window to see his vehicle pulling into the lot. I was physically, emotionally and mentally drained. My health suffered, sleep suffered, and appetite suffered. It SUCKed with a capital SUCK. However, when he left, the first couple months I was even more of a wreck.
Now I'm doing so much better. I actually eat. I actually sleep. My doctors tell me I'm now in terrific shape, and are impressed.
Having said all that, I would never recommend telling them they need to leave. As much turmoil as I was in, it was better that his leaving be solely his decision. See, in MLC they already do that whole "poor me I have never ever ever gotten a chance to make decisions for myself"; also it was my way of letting him know I'm tougher than him and could take whatever he gave out.
Patience is the weapon that forces deception to reveal itself.