I'm going to take a different approach. If she's not ready for a divorce, then there's still a slim hope, even though she broke up with you.
Therefore, try this approach, though it may be easier said than done:
It's great that you have considered therapy for yourself. You've identified that you have some problems and you want to tackle them. Good first step! It's a good idea to stabilize your own emotions and your own life. As the saying goes, "how can you help someone if you can't even help yourself?" Once you're in a solid position, you will be in a better position to help her.
If you want her back, then let her know that you love her and that you are willing to do whatever it takes to make the marriage work.
Remember, it takes two people to make a relationship work. So after you let her know that you are there for her and that you want her back, the ball would be on her side of the court. It will be up to her if she wants to work things out. So you will have to be patient to see if she comes back.
However, even though you've taken all these steps, there's a possibility that she still won't want to come back.
She definitely has a lot of issues to work out, so patience is the key in repairing this marriage.

