Jellybeans

You are going through a major trauma right now.
Don't let anyone tell you otherwise.
It takes TIME but you will get "through" it. It's not something you "get over."
Get some counselling if you can and Anti-depressants if you feel you need them.
Start exercising and meet up with friends, people who make you feel happy.
Your husband probably got married before he was ready and/or started to feeling trapped. He is not a good person to have a relationship with. On the flipside, I think it's very good he told you how he felt instead of stringing you along for another year or ten or more when he had already checked out.
He did you a favor. A major one.
Have either of you seen a lawyer?
When I first separated, I could not leave home for about 3 months. I was completely immobilized to the bed (besides going to work). I did not want to see anyone and went through the deepest depression I have ever been through in my life.
I won't say you'll feel better by tomorrow cause it's hard but you will get there in time.