Glad you are getting therapy.....one of you going is better than just letting this situation go on.

This is a problem for you , so YES it is a real problem. If 2 people won't communicate, how can anything every be understood/resolved?
There is no way to know why he reacts the way he does, unless he is willing to be honest.

I wonder if he knew about your thoughts of being single and raising your child......if things don't change.....if that might give him the impetus to go to couples' counseling. He needs to understand how serious this is.