t sounds as if your mate is having an affair with another woman. I would investigate that more if I were you. I would even hire a PI just to be sure. After all, this is your husband we are talking about.
Other than that, I really don't know what to tell you. It's sad that your mate is reacting towards you this way. Sex is and should be a big part of a marriage. It's not just the sex act itself but the sharing and fondness of the act.