To be honest, I have wondered why you have continued to put your life on hold, I guess you said it all you are too compassionate, and like me, you are codependent.
Being codependent is not a healthy way to live, it keeps us stuck. I was stuck for way too long, I had to let go, I had to move forward with my life, for me. Yes, when I let go of my exabf, I still cared but I finally accepted that no matter if he ever got clean or not, this was a one way street, it was going to continue to be all about him. And that was not a healthy situation for me.
So, I bit the bullet and moved forward, best decision I have ever made for me. He is still using, been in and out of rehab another 3 times. Unfortunately, I think he will die an addict. Sad, but true.
Do what is right for you, this is your only go around in life, make it the best you can for you.