Originally Posted by borzoimom
By your admissions- he was into drugs. Drugs or alcohol turns people into what they arent. If he cleaned up his act, it is possible you are actually seeing a person that has been in there- but the drugs covered it up. Watch with one raised eyebrow for any signs of " the old guy" coming back, but any use in drugs is like a possession of the spirit of the persons self.
My older brother was a alcoholic. When he drank, he was a different person. A hateful person. He has been sober now for like 18 years, and is this wonderful caring person. Its hard to give someone that hurt you so another chance, but maybe if you understand it was the deed with the drugs, and not the person, this might help you accept him. Give yourself plenty of time to make sure he doesn't " back slide"- maybe just take today as the a day, and go from there...