I don’t mean to be harsh really. And the women aren’t always the innocent parties either. If she had been the one to write here and ask what she should do, I’d give her an earful about her first responsibility is to her marriage and not every church committee, and how she should be lucky her husband wants to work things out and seems to have learned from his mistakes. Some of us were married to men who never admitted they did anything wrong.
And I would have told her that she as a Catholic who exercises moral leadership in her church she has a moral obligation to not cause scandal by divorcing her husband for frivolous reasons. If she is not being abused or cheated on or swindled or beaten, she does not have any right to just walk away from a vow made on the altar of God. And if she does so, if I were her priest, I’d remove her from any position of authority so as not to cause scandal in the parish.
Her husband wants to fix things, not end it. And so she has an obligation to keep trying.
But she didn’t write in. He did.
And I’d tell him that if she went through with it and then got a divorce and tried to get an annulment (based on the urgings of ignorant people who may tell her she has a good case for one), I would suggest he continue to live as if he was married, not date, and participate fully in the annulment process, answering all the questions honestly and detailing his attempts and pleadings to get counselling that she refused and her unwillingness to work on the marriage and that not all attempts to save it were made.
And I’d ask the husband if he’s absolutely sure that with all her socializing whether or not she hasn’t met someone else and thinks the grass is greener elsewhere.
In short, divorce is the nastiest thing you can go through. God invented death, but He abhors divorce. That should tell you something.
I have no patience for people who file for it and abandon flawed but faithful spouses who want to keep the marriage going. And I have no patience for spouses who make their husbands/wives feel irrelevant and unloved. Been there on the receiving end of that one. So I’d be mean to both of them.

I’m just loveable that way. When people promise God something, they are required to love, honor and cherish and remain together till God decides its over. Don’t mean to make the OP feel he is the only one singled out here.