There's a lot of ways to frame the issue. The trick is to find a way to frame it that works for you, that keeps you sober.
I'd been sober 205 days when I drank on December 29. Looking back, I didn't feel like I was walking a tightrope at all. But I was drinking way too much coffee, was irritable all the time, wasn't exercising, and in general wasn't taking care of myself like I should. I can see now that in subtle ways I'd distanced myself a little from my self-image as a non-drinker.