I broke up with my BPD partner but we are still living together (financial reasons). He just started taking meds for his comorbid bipolar disorder has therapy scheduled but right now everything is still bad and I don’t know what to do anymore. He is threatening suicide again because he was feeling very stressed and wanted comfort but not by cuddling or talking he wanted sexual stuff and I said I wasn’t in the mood (We aren’t together and plus I was trying to do some medical appointment stuff for myself) so he started pulling the blankets on the bed around and I left to the living room so he started banging on the walls and eventually came in and flipped a couch. I told him I needed to leave to work and he wouldn’t give me the keys to the car we share. So I ubered to work and he’s texting me saying he needs me to call off and go home and he’s sending me pictures of his empty medication bottle saying he took them all. Every other time he has done things like this I took it seriously and went home and he calmed down eventually. I’m not going back this time until after work. I told him it is a boundary for me. 
I can’t call the cops because he could get killed. 
I just don’t know what to do I feel like I am the only one who can help him this has been going on for so long.