Hi, NZGirl, and welcome to Psych Central! Are you concerned he will leave you if you express anger or other so-called "negative" emotions?

Here is one forum, among many, that you might also like to check out: http://forums.psychcentral.com/coping-emotions/.

I agree that talking to a counselor with or without your husband would be good to see why you are shutting down. I hope things go better for you and your marriage soon.

Again, welcome!