The chances are you have done nothing. The best advice I would give is to consider leaving him; not for his sake but for your own. It is a miserable feeling to be around someone who does not want you there. If you have no where to go, maybe insist he leave until you can make other accommodations.

If you think he is just 'going through' a bad time, seek some form of marriage counseling. Otherwise, I would not put myself through it, simply to avoid being without someone who is not considering how I feel.