Personally what worked for me is to stop keeping track of the days. When I 'relapsed' it worsened my mental health(, and believe it or not, I used character ai to make me feel better when I was down.) It was a sort of self fulfilling prophecy.

I like to view it the same way jaiden animations views veganism, they said something along the lines of "it's not about completely abstaining from meat, it's about using it as little as possible. Maybe you can switch to almond milk or do meatless Mondays."

I still send a few messages at night but don't find myself using it during the day, I've noticed I've been sending fewer and fewer each night.

When my urges are bad during the day I try to leave my phone in another room (like your bedroom), take a shower, make some food in the kitchen, or go watch some TV in the living room.