I was planning to go to him in a time of calmness and sobriety and discuss it -- didn't want to end it in the midst of a relapse -- but given the course of events, it was the right time. Timing is everything, like they say.
It's never a good time. But you know when it's the right time. It's when you've had enough.
My ex was constantly in the midst of a relapse. If I had waited for him to be sober to break up with him... it might never have happened. He was either high or he was coming down and begging for another chance. I finally accepted that it was about me, not him.
I wrote down my boundaries. I wrote down the consequences for violating them. And then I held myself accountable to myself. It became clear to me that if I wasn't willing to follow through on my promises to me, why should anyone else.
Be sure to keep us posted on how you are!