You are doing the right thing. Just leave him. He may come to the realization that he truly needs you and come back, but perhaps he won't. It is true that drugs and steroids can cause this and there are a few people who's partners have gone through this - cm morris on here recounted her husband's behavior and it sounded similar. He was terminal at the time and one of the stages of grieving is anger but I believe at some point towards the end he did com around. It's hard to tell if it's drugs or the emotional trauma, laying name and anger at th world for what's happened, but it sounds to me like both at work here. Regardless as long as he knows you are there for him that's all you can do. Take time for you and yor children now and leave him be. Hugs