Gwyn- I'm a little confused as to why you feel like you need to decide right now. I have heard that a decision to walk away may provide some temporary relief. Until you begin to realize that you may have acted on emotion and doubt creeps in as you begin to regret your decision. A decision to walk away from your marriage will not make the pain go away. It will be a step toward a path that you have chosen, but unfortunately, your H's A will be the baggage you carry with you regardless of the path you choose. It isn't fair. But that's the way it is. With that being said, you need to embrace your reality Gwyn b/c you can't erase what happened, you can't make it go away and there's no magic pill to make you the same happy Gwyn you were before the A. I cheated on my H. I can't go back in time and I can't change it. But I can learn from it. Be a more loving and responsible partner than I was before the A. But to get there I have to make the journey so that what I did doesn't occur in vain. It didn't happen for nothing, only to cause pain. I have to *make* some good come of it. You can do it too.
"Happiness is a butterfly, which, when pursued, is always just beyond your grasp, but which, if you will sit down quietly, may alight upon you."