Hi, G lady, and welcome to Psych Central! I have a history of anxiety and I know therapy can help, so support him in going. Also, you might want to read about anxiety. It seems like you have a good handle on what's likely going on with him. There are some good books about boundaries as well. He might or might not be willing for you to give him "advice," though. I suggest you continue to show your love for him, as you are obviously a very caring wife.
I have taken meds for anxiety, so if his counselor suggests that, then please go along with it. They can help along with his learning other techniques. Okay?
Again, welcome! Please keep us informed. We are here to support you, too.