G, you can't really know right now what his intentions are because he probably doesn't know. Your priority and his needs to be his mental health right now. Your relationship will have to take a backseat. Unless and until he gets on some medication and his moods stabilize, he can't really make clear decisions. Proper medications will make him a different person.
My exH from my first marriage(marriage I DB'd is second) is bipolar. He refused help during our M. He couldn't face the reality that something was wrong. After our separation, he spiraled down quickly and he was forced to get help. Once he made peace with the fact that he needed help and meds, he's been a changed man. But it took him several years to get to that place.
You are in for a long road ahead. Be patient with him and yourself. Also, know that he probably feels horribly guilty about his illness and what it's done to you. The good thing is that he is seeking help and wants to get C with you. That's really remarkable.
