But that is what you should do, remove the addiction. I don’t know about pretending he isn’t an addict, but removing the addiction is a good thing Don’t have it be the blame, the cause, the reason, then you can look at the actions. Like what you wrote, being stood up, isn’t ok, stealing from you isn’t ok…define how you wish to be treated, and what is acceptable to you.
I removed the addiction a long time ago, all across the board. The addiction means nothing to me, it gets no power. Yet how I am treated will define who is in my life and who isn't.