I know exactly how you feel. I've been married for almost 20 years and have been hurt and angry for most of the last 10 years or so because of the lack of sex. My wife complains quite a lot about work and nothing I ever say comforts her no matter how hard I try, and her problems at work is one of the main reasons she gives for never being in the mood. I've made plenty of messes when I was angry, but it seems to me she always understood it was my frustration with her lack of desire that caused them and made them easier to forgive.
A while back I made a decision to not get angry anymore. Our relationship got better, but the sex has dropped off even further. Now depression has taken the place of anger.
I'm an optomist. Even as depressed as I am, I keep thinking to myself that things can't get any worse, the only direction is up.