Off,
I hate that you are going through this. That is quite a blow and especially on your anniversary weekend. I know that there is light at the end of the tunnel but that doesn't help right now. In the long run, the gift that he has given you is the awareness that he is a skunk as well as having an addiction problem. The pain is acute but in the long run it will help you to move on away from him. Many addicts have other addictions going on concurrently and he might be using sex to numb and avoid his issues. I don't know if that is what he is doing but no matter what it's a message to focus on you and taking as good of care of yourself as you can.
Just wanted to let you know that I am thinking about you.