Well, I contacted the OW once. I didn't get any satisfaction from it, it doesn't really help even though you think it might. They apparently discussed it and prob. laughed. I've never done that since. I think it is something that you might regret.
I agree with Puppy on dropping the rope. Focus on you and your business. You can decide what to do later. I do think if your H's been getting money from family and friends for the business and putting it towards OW, if it is your family and friends, maybe something can be done about that? Other than that, I would concentrate on you. GALing and leading a busy, positive life helps us to get through this. Church is good if you're inclined to that. You need to get to no contact, maybe just brief business-related emails and that's it. You can do this, and if you do you will feel a lot better than you do. I found the less contact with my WAS the better my PMA and I think it might be the same for you.