To 'let go and let God' means that you have the free will to do what you want to do to improve your sitch and yourself. When Moses went to free the Israelites, they didn't tell him "no thanks, we're waiting for God to save us".
God gives you opportunities. It's up to you to take them or not. You can either see this time as one of stagnation and sadness or strength and growth. You can't just 'will' him to come home. But you can 'will' yourself to create the you that you've always wanted. If you think you're fine just the way you are, then that's okay. But don't expect your H to come home because he doesn't think it's fine. There is usually a healthy compromise where the two of you can meet half way. What is that for you?
So far in your posts, you haven't even answered the question of what would make you attractive to your husband. You are still going around and bashing the OW thinking that if she wasn't there, he'd be back.
That's not true.
If you haven't changed, why would your H want to come back? Obligation is one thing, but he will feel like a caged animal. Have you tried making yourself more desirable in the way that he wants? Have you been condemning or accepting?
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.