Hey! So my boyfriend has bipolar type 1 and medications are CRUCIAL for his manic episodes which escalate into psychosis so quickly. For some background as to how bad it can get…his last unmedicated manic episode resulted in over 10 hospitalizations over the course of 6-8 months. 
I recently learned that he has been off his meds for a few months now because he “feels fine”. Apparently his psychiatrist also quit her job and cut him off cold so im currently helping him look for a new psychiatrist.
I’m supposed to be moving in with him next month and I feel uncomfortable with doing so if he’s unmedicated.
I had a conversation with him and his roommate (who doesn’t even know what mania is) last night, in which his roommate basically said meds are stupid and he shouldn’t be on them.
His roommate clearly doesn’t know the extent of mania and it’s consequences. These conversations are a trigger for my boyfriend so I have to approach them very carefully.
I feel like I need to inform his roommate of what will truly happen if he goes manic again unmedicated but I don’t want to do so without involving my partner.
Just looking for some advice as to how to even start this conversation with them and what I should say.
Thanks for any advice!