Hi AnnaMarie,
I can't really add to the wisdom that's already been given here, but I just wanted to say that I am so sorry that you are going through this, and will most definitely keep you in prayer.
I don't want to post anything negative, but may I ask, when you say that your husband is spending more and more time away from home, do you know what he's doing or whom he is with? I just ask because this might be a strong indication of the direction things are headed in next. I pray that you won't be blindsided in any way and that the Lord will both strengthen and prepare you for whatever may come.
I also had to mention that I was very touched by some of your posts around the forum in which you are also offering to pray and be there for others. It is truly amazing that in the midst of all the turmoil you are going through, you are coping by serving others.
I know that when I was going through some of what you're describing, my heart wasn't half as admirable as yours, that's for sure!
Blessings to you and I hope you'll do the same here as you are offering to others -- please keep sharing with us how you're doing, and allowing us to pray for you.
May God bless and comfort you, and I pray that your husband's heart will be softened, and your marriage restored.