I think you deserve much better. This guy showed you his true self. The man you fell in love with is a front he put up to pull you in. Someone mentioned on another thread that addicts can put up a front to reel in a new mate, then once you're hooked the facade falls away.
This guy is a user and a manipulator. He is not going to magically change into a good person because he spent a few weeks in rehab. You have the power to break this cycle and make room in your life for a healthy, loving relationship. Watch and wait. Give this more time. Real fundamental change takes time. If he is still this sober, kind and loving person a year from now, then maybe consider meeting him for coffee.