What do i do

What do i do if my boyfriend actually kills himself if we break up. My boyfriend is struggling with his emotional stability and severely suicidal. He’s personally depressed, and he says our relationship is what keeps him going. But our relationship isn’t healthy for the both of us anymore. We miscommunicate and misunderstood each other so often. The more we stay together, the more we do things that hurts our relationship and in my side, its just hard for me to work it out. I don’t feel connected to him anymore, i feel like im not emotionally and mentally attached to him anymore. But every time we fight he takes pills to try to kill himself. I tried to get him to a professional help but ended up sending him to a 51-50 that made his condition worse. Now we’re both traumatized getting help. He refuses to get therapy because to him he says it doesn’t help. I don’t know what to do in my side. Our relationship is getting more difficult for me at this point.