How do I feel whole Again?

On my 34th Anniversary I saw the proof of what I had been suspicious of since November 2014. My husband had been cheating and lying to me about his online affair/emotional infidelity! The signs were all there and I confronted him about it several times since my suspicions, but he flat out denied it and even made me feel like I was being paranoid and unfair about it all.
When I finally had proof I realized that it was so much worse than I thought. He was not just chatting with her -- he was taking pictures of his privates and sending it to her, texting at all kinds of hours, giving her his schedule, planning on a meeting next spring, and even divorcing me to marry her!!!
I feel so hurt, betrayed and dirty. My heart is in pieces and I don't know how to put the pieces back together.