Have you been going to meetings, found a sponsor and begun to journal about your recovery? I ask because if you want to see change, it begins in your heart and with your actions.
For me, once I began doing those things, I slowly stopped obsessing about my son's addiction and began paying attention to my own feelings. When I was having an "off" day, I learned how to take pause and look at why I was feeling that way and then how I could turn it back into a good day, as all days should be. Reading Codependent No More helped me understand why I was the way I was and started me journaling every day.
His recovery may or may not work for him. None of us has any power over whether our loved one will make it, or whether they will relapse again.
But we do have power over ourselves, and for me, finding meetings and learning to work 12 steps that literally saved my life, was the only way to regain my balance and prepare for days ahead. Today, many years later, I still have daily recovery routines that are as important to me as brushing my teeth.
You have made a Plan B, and can make a C, D and E if need be. You don't have to do anything until you are ready and comfortable that it is the right thing for you. As someone wisely told me a long time ago..."doing nothing is an action too, sometimes it's exactly what we need to do before we do anything".
Good luck with your therapist too. I hope that helps you through this.
Hugs