He left the message, you "reacted" to many people. No doubt he will hear that you reacted and do it again. Accidental or not, you played into his game.
The question is, how long do you want to continue this dance of codependency? You get to change your number, you get to let go of his problems, let go of "what might have been" because it isn't and it has a great cost (living with an active addict who plays games), you get to say "enough" and never "go there" again.
The choices are yours. The consequences and/or rewards are yours also. So far, I don't see you getting anything from this relationship except pain.
Maybe, just for today, choose living life well. Change your number, find yourself a meeting and wrap yourself in recovery for you because you deserve so much better than this. Choose to live in the solution instead of the problem and good things will follow.
Hugs