Hey everyone.  Recently a very good friend of mine (10+ year friendship) recently moved into my home as a 3rd roommate.  We are renters.

He's always been open with me about having a schizoaffective disorder, which he has described as limited to "mild visual and auditory hallucinations" (his words).  I knew it would be hard for him to get on our lease formally for various reasons, so I let him move in under good faith, with a plan to write him up a sublet agreement, as I would do for anyone in the situation so we're all covered as respective tenants.  This friend has always been exceedingly reliable, kind, and honest in all of the years I've known him, and we're very close, so I felt like I could trust him for a few weeks until I could get an agreement written up.  It was also made clear to him that, naturally, myself and my other roommate literally can not afford to pay other people's bills or rent, so that if he was going to live here, he would need to be reliable with that at the very least—he assured me he would be, and paid first rent and security in a timely manner.

My friend is medicated for his condition (in addition to a few other meds for depression, anxiety, etc) but I do know he hasn't been taking them reliably—he started drinking excessively when he moved in with me, and I'm assuming that probably has something to do with his recent erratic behavior.  To be transparent, I also deal with mental illness and am medicated for various issues (and I have dealt with substance abuse in the past) so I know that generally, heavy meds and copious amounts of alcohol and cigarettes on a daily basis don't mix well.

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We're approaching month 2, and things have **completely** gone off the rails suddenly with him in the last few days.  A few days ago, he started (unprompted) sending me aggressive and erratic text messages refusing to pay our shared heating bill.  While I was staring slack-jawed at the text, he called me in a panic, and told me he was "*on the side of the road and calling an ambulance, because I feel like I'm dying, but I'm fine*" and then hung up on me.  He was fine, thankfully (and I'll skip the follow up details), but since that event, he has without explanation refused to speak to me or come back to our shared property.  When I last asked him when he may be home, he sent me a *5-paragraph long Bible verse* in response.  In our roommate group text today, he sent another long, erratic message detailing "*money owed to him*" (for things that we've literally never purchased, including a U-Haul and a curtain rod), refusing to pay our utility bill.  I have not been fighting with or engaging with him in any way since this behavior started, but I did restate the details of the bill and why it was owed.  He then asserted that he would "*move out*" if "*sending $7 for the bill didn't work*" (I guess that's the number he landed on for what he feels like he owes...) and then falsely asserted that the rent isn't due on the 1st of the month.  Surprise, it is, and it's in a few days.

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So, long story short, I've never experienced anything like this with him AT ALL, and I have no idea what to do.  I'm really freaked out and also now trying to figure out how to both get my friend back and also keep a roof over my head.  I know he's crashing at his parents place, who are local, so I'm not worried about his safety, but I'm desperate to find a way around throwing him out formally like, today—he is still my friend and I want to be supportive, but he's about to financially screw me and our other roommate.  I know it should be a general rule not to depend on anyone for rent who isn't legally assigned to do so, and that's my f\*ck up—I Just really wanted to help my friend out and not judge or mistrust him prematurely because of his condition.  Also, again, he's one of my closest friends—it's very painful to experience this from him.

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Any advice on how I can help my friend and move forward would be so much appreciated!