Thank you all for the responses. You are giving me some new perspective on this, which is what I needed.
I'm definitely going to take time and think about this, as Anvil has suggested. As I indicated earlier, things are mostly good. We enjoy each other's company, hang out a lot, have a good sex life, and are supportive of one another. At this point, there are FAR more good things to say than bad.
I guess I just can't help but glimpse the future sometimes, and like Crazed said, when I do this, I can only see things getting worse. It is this, plus the sting of possible lies and deceit that worry me.
So when it comes to when and how much she drinks, is it really best I say nothing?
Again, thank you all so, so much. I needed this.
EDIT: Thank you jmartin. All very good advice.