When my 1st husband went into rehab, the doctors and therapists told me that the "addictive" behaviour would not be gone overnight. In fact, they told me ONE year before I would see much of a change. And unless they work a program...you still have an addict..minus the drug. The drugs are not out of our system for quite some time. My ex didn't seem to make any sense until he had 6 months. It was about that time he seemed to come out of the fog. And if your ex is working a program and is serious about recovery, they usually don't contact you. I'd be glad if he didn't. That would me he was working on himself.