My suggestion is to get deeper into the Lord as much as you can as often as you can. If your husband loves God and has ever really loved you, he will be unable to survive long as he is... especially if you are praying continuing for God to deal with his heart. Your husband probably thinks he wants freedom, but there is no real freedom in the direction he's taken. People in their flesh alone do not understand what freedom really is. Yes, there may be moments of apparent comfort without God, but it is not real comfort and it cannot last. Does that mean he'll come back to you fully repentant? We can hope and pray that he will but God offers no guarantees that another person will decide to turn the right way. Each person has to decide for himself. Our prayers will cause God to speak to the person's heart but the person must still make the final decision. If he decides wrong it is likely to hurt him and you.
"Come unto me, all ye that labour and are heavy laden, and I will give you rest.
Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
For my yoke is easy, and my burden is light." Matt 11:28-30
Those words do not mean that there will be no physical and/or emotional pain and suffering. On the contrary we know that Jesus himself suffered much pain throughout his ministry but He was always resting in and with His Father. This Rest is where you need to be in order to handle whatever comes when it comes.
I am continuing to pray for this situation as well.