Awesome post Angie! I've been following your thread since you started it and you continue to inspire.
I'm about a year sober and I have shared many of the same anxieties about..."Well, I'm doing great, but can I keep this up forever?"
I think the only way I can describe it is that sobriety becomes the norm. The new normal. Does that make sense? I think all humans like a sense of normalcy and predictability so that's really nice that after some sober time, going through the day and night without alcohol is normal.
I no longer go to bed and think "Thank god my head is hitting the pillow sober." Now it's more like "Well that was nice day..."
We always stay mindful of our sobriety but it continues to get easier and easier, or more "normal."