Hi Tyler - I'm so sorry you are having to deal with this
You are smart to start taking a look around SR, though and I'm so glad you're here. This place has helped so many people get their lives back on track and the wisdom shared here is nothing short of incredible.
My initial thoughts about your situation is for you to get busy thinking about what is or is not acceptable to you in this marriage. As you do your reading, go to meetings, hang out here at SR, etc... you may want to keep a journal to help you sort through your feelings and goals for your life. In the end there is really nothing you can do to control her behavior, you can only manage your own.
I think all of us here came to the board with the same question -- "How can I get him/her to stop using?" I'm sorry to tell you that we don't have an answer for that. If we did, we'd be millionaire addiction specialists with clinics all over the country! The only answer is to learn how to have the best quality of life possible whether you choose to continue living with your addict or not....both situations require that you learn the fine art of DETACHMENT.
We're glad you're here and that you finally posted!
Welcome!!