You can go for any reason you want to. You can make any use of the program that you want to-- to save the marriage, to end the marriage, personal growth, better understanding of your H, better understanding of the dynamics between you two, self forgiveness, forgiveness of him, falling in love again, deciding for sure you want out. Just be OPEN to the experience. Don't go in with a preconceived idea of what the outcome should be. Whatever happens, it will be a good experience.
If you're into praying, pray that you will get whatever you need from this experience.
