You are totally making sense. If you are willing to stay in your marriage as it is, then you shouldn't make an empty threat about leaving. Consider this. In your above post, you said that the sich was making you practically suicidal. How could following through on leaving him if he is unwilling to attempt to meet your needs be any worse. The problem that you and I share is that we let it get this bad before being willing to take a stand.
"Tell me, what is it you plan to do with your one wild and precious life?" - Mary Oliver