As dying is part of living, so is letting go part of loving. No husband should ever provoke his wife to sorrow. No husband should ever be mean to his wife. As far as you are concerned, the husband has wronged the marriage, and you must continue your walk with the Lord.
In due time, the Lord Himself will either return the husband back to you, or the Lord Himself will deliver you into His joy far away from a corrupt husband.
Don't let emotions take over during these difficult times. Be reasonable and in everything you do, seek the mind of Christ and "pray without ceasing."