I'm so sorry that you're going through this. And I hope your husband goes through with the family counseling, and that it makes a real difference in your entire family's relationship. But if he backs out of counseling, or if he keeps insisting that everything wrong is your fault because you're too "insecure," then it doesn't sound like a relationship that you'd really want to continue.
I spent seven years in an emotionally wrenching relationship, during which my ex insisted that everything that was wrong between us was the result of my battles with chronic depression. And this was coming from someone who had been diagnosed as bipolar! He finally told me that he had to move out because my "insecurities" were causing him too much stress. Well, it turned out that he moved out because he was cheating on me and wanted to move in with the other woman.
I'm certainly not suggesting that your situation is the same. What I am saying is to watch out for anybody who tries to blame you for his relationship shortcomings. It's a cruel and selfish thing for someone to do.