One Spouse Changes Religious Beliefs

Looking for some advice. My wife and I both belonged to the same church when we were married and have continued so for the past 6 years. I recently have done a lot of digging and soul searching and decided that I no longer believe in that religion. My wife, for the most part, has been understanding and ok with it. However, now that I want to do some of the things that were against the "rules" in my old religion, she is understandably having a hard time with it. Specifically, what really bothers her is that I have started drinking which was very much looked down upon. There have been a lot of long drawn-out arguments about it. She won't budge in her opinion that I should completely stop. In fact, she has given me an ultimatum that it's her or beer. I won't budge in my opinion that it's ok for me to have an occasional beer as long as it doesn't affect time with family, etc. I think what it boils down to is our fundamental difference in how we view our marriage. She feels that there were expectations based on the values each of us had when we were married and that we made a promise to eachother that we would keep those values. My view is that when we married we formed a partnership to go through life together understanding that we would learn, grow, and change but that we would be there to support eachother. I completely understand her point of view and don't think it's an outrageous position, but I would like my point of view to be validated as well. And I feel like I'm getting more of a "my way or the highway" type of attitude from her which is evident by her ultimatum.

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