Welcome to the boards. I'm sorry you find yourself in this situation, but you've come to a great place for support.
I can't really give you any specific advice about your sitch as it's very different from my own. I can tell you there are two trains of thought regarding affairs (A): expose/confront or become the better option and wait it out. You can look around for people who have chosen these different paths and see how it's working for them. That may help you determine which way you want to go.
While we wait for others to chime in I can offer some hints on how to get along here.
Read others' threads. You'll see a commonality which is usually comforting. Post to others' threads. Even if you don't have any advice to offer you can offer words of support. This will introduce you to others and let them know you're here.
Be patient. Sometimes it takes a while for people to find you. It helps to keep all your posts on one thread and not be all over the place. If your thread is falling down in the list it's ok to bump it up yourself.
Give us some more background. How old are you? How long have you been together/married? What are your W's complaints about you (besides buying the truck)? Are there other issues in your marriage (M) that you have noticed?
Since you don't have the book yet I will tell you that you need to keep in mind you cannot change her actions, only your own. Focus on improving yourself through addressing any issues that you have, engage in getting a life (GAL) through activities.
And no, I don't believe there are DB coaches in Canada.
If you love somebody, set them free. http://tinyurl.com/2empx2g
