Believe me I had my episodes of being down, but I soon realized that the duration was shorter and the episodes were farther between. I am still GALing by going to the gym and I had a great weekend with my youngest son.
Your questions is a good one and one that I have not thought about in a long time. I guess my first reaction would be to understand her motivation for wanting to come back. If it sounded legit then there would have to be a lot of work on her part. I still love her, but I realize that I do not need her to be happy. I have been doing pretty good the last few months without her. In fact, I think I am a lot happier now than I have been in the last year and a half.
My sitch is easier than yours in that my W forced me to detach due to her darkness. Your H who is both arrogant and insecure is still hanging around you and keeping you pinned up by not allowing you to have your own free time. My W never had an A while we were M. If that would have been the case I would have reacted like she did and move on due to the lack of trust. My W had to wait until she had her career set and that she was financially secure. I hold no grudges against my W she did what she thought she needed to do to be happy.