Hi Italy, sorry your H is lost in space right now, but you've come to the right place. The folks here understand completely what you are going through, and will help guide you along on the journey you never signed up for.
First thing I want you to do is take a deep breath, and calm yourself. Know that you guys will make it through this, but it will take some time. Even though you're going nuts inside, I want you to remain calm around your husband. Don't pressure him to stay or press him for reassurances... he needs to work through this crises on his own. The fact that he accepted he is in a MLC puts him a step ahead of most of them.
Take care of yourself. Eat, sleep and exercise so you stay healthy. Keep yourself busy doing things you enjoy. Post often. Most of all, hang in there!
M: A really long time. Crisis: 5 years. She's still worth it.
Life is never made unbearable by circumstances, but only by lack of meaning and purpose. -Viktor Frankl