TLC - I don't know if you've abandoned your previous thead or not, but there is another message to you on that thread.
But let's turn to your current post for a minute;
HGe is on anti-depress. which help him a little. He wants to know "Why would I ever stray from you? Something is really wrong with me!". He wants quick answers from the doctors but gets fustrated when they can't tell him "WHY" after 3-4 visits.
The "WHY" is a simple question to answer. But having given him the answer he has to CHOOSE. It really IS that simple.
TLC, I am going to assume, unless you tell me differently, that your husband claims to be a Christian. THEREFORE, the answer to his question, and the answer to how you both recover from this infidelity and build a marriage that "sings" is quite clear and quite simple.
The "why" is that your husband DOESN'T trust God.
So your husband is right, there IS something wrong with him. It is called SIN. We all have that "disease" and we all struggle with it our entire lives, especially if we don't surrender our lives, our wants, our desires, to God. The KEY is to keep God on the "throne" in our lives. If we move Him aside and sit down on that throne ourselves, we are ASKING for trouble, "You cannot serve TWO masters, you will love the one and hate the other. There CAN BE only ONE "lord of your life." If it is YOU, then you will "allow" yourself to do whatever you want and whatever makes you "feel good" for the moment. After all, you have no one "higher" than yourself to be accountable to, right?
TLC, God bought us with the death of Jesus Christ. HE who knew no sin, took on ALL the sins of everyone and sacrificed himself to pay the awful penalty for sin IN OUR PLACE. WE are HIS, we are no longer our own. That is the position that we place ourselves in when we ACCEPT His gift of forgiveness of sins through what Jesus Christ did for us.
So the "why" your husband says he is searching for is as close as the Bible you may have laying around in your house. "If you LOVE me, OBEY my commands." This is a COMMAND of God to believers. It is NOT open to discussion or to "occasional" application or nonapplication.
But Satan is right there to tempt us, to reiterate what he told Eve, "God didn't REALLY mean what He said, did He?"
TLC, your husband is struggling with the same problem we all struggle with....we are still encased in a "sinful, sin-natured body" as long as we are alive. We "fight the fight." We "choose DAILY to follow Christ." The life of believers IS a life of suffering because we will be under attack simply for BEING a Christian. Remember, Satan is the "god" of this world and Satan HATES anything to do with surrendering individual will to God's will. Satan enthrones himself on the throne and wants God and everyone else to be "beneath him."
Put on the full armor of God, so that you may stand.
TLC, the answer for your husband lies in total surrender of his life to Christ. He can then start putting on the "armor of God" and learning what it means to surrender his will to God and to "stand ready to give a reason for why he believes."
I strongly recommend that you both see a counselor trained in Nouthetic Counseling. See him/her jointly, as a couple.
God bless.