Well, I hate to say that it sounds almost exactly like my ex, but it does.
He lied over the course of our marriage and hid his addiction to opiates, but kept relapsing and relapsing. He also made me feel like I was somehow the crazy one. This was before I realized he was a complete liar.
He has almost OD'ed and died, having to stay in a hospital for several days due to overtaking pills, yet he still relapsed. He didn't seem to understand any consequences to his actions. He also recently got arrested for the umpteenth time in his life, and while in jail, kept calling me asking for help and crying out that he was remorseful and wanted to be a good father and husband. He has since been bailed out by his grandmother almost a week ago, and I haven't heard a peep from him.
Bear in mind he also hasn't seen him two small children in almost 4 months, let alone me, and has no remorse over that either, it seems.