Ben,
My heart goes out to you.
As long as you still have life, there is hope.
I just did an internet search, and Chantix is linked to anxiety, severe depression and suicidal behavior. Here is just one link on this issue:
http://www.chantixsuicidelawsuit.com/
I'm sorry your wife didn't have the courage and integrity to talk to you about how she was feeling.
I would try to write this whole thing off to your wife not having any emotional integrity.
My prediction is that at some point in the future you may hear your wife has split up from this new relationship.
In the mean time, I would encourage you to try to stop thinking about her the best you can, and make plans to move on with your life. Find some way you can do something good just for you.
In 2002, I lost a long-time career that I loved. The same year it also became clear we could no longer safely manage an older child, we had tried to help through adoption, in our home. We also sold a house I loved in a community I enjoyed, and moved to rural Kansas.
I have been trying to put my life back together, and God has been good. He has continued to be faithful to meet all my needs and provide for me.
Are there any good churches where you are that offer divorce recovery support classes?
There are a lot of supportive people here.
Keep posting and believing in you.
EJ