I'm sorry for your pain, Alice32. You must be heartbroken after having so much hope.
You don't need to take any action right now if you don't feel ready. Right now, as they say in Al-Anon, your thinking may be "distorted" and you may find yourself "trying to force solutions." (Al-Anon).
You need the counsel, face to face, of people with experience and you can find that in Al-Anon or Nar-Anon meetings and with a therapist.
The risks to you: your health (mental and physical); your money and possessions; your friendships and family relationships; your goals; your values.
All are at risk if you become caught in the obsession of monitoring a drug addict.
As the drug calls to him more and more, he may call you "controlling", "cold", or "not who he thought" you were, as an attempt to get you off his back so he can use.
What happens to us then is that we are blindsided by the addict's flip from love to hate. And our self-esteem plummets to zero and we perhaps cling even tighter. This is the disease working on us and we can become very emotionally ill.
Please seek help for yourself, because whether you stay with him or eventually part, you'll need to understand what happened so you can be at peace.
Stay strong. God bless.