I think you understand perfectly well what is going on. And I also think you should think long and hard about exactly the question if you really want to live the rest of your life with him. It is one thing to live with a person with a mental illness (whether it is bipolar or something else) when they themselves have some insight into their own issues, and are willing to take professional advice etc. Then I think it is reasonable that one does not give up on that realtionship. But your boyfriend is not at that stage, in stead he is on a very self-destructive path, and he might take you with him. Maybe you should leave him, if only for a while, maybe that will make him realise the huge mistakes he is making? You should not have to go through anguish and all sorts of trauma for a man who is not at all willing to better himself.