I admire you taking responsibility for creating some of the problems in the relationship. I think that is a good start. Couples sometimes need to hit this level of dissatisfaction before they can have a turnaround. Frequently it takes a separation like this to realize how important the other person is to you.
I would strongly recommend you bring your concerns to the marriage counselor and to continue working on yourself and individual therapy. This sounds like an important and critical time for the relationship. See this as an opportunity to bring positive changes in your life personally — and as a couple.