I would amen shazeep comments. It sounds as if this guy is using you as a crutch to enable a habit that he doesn't want to share with you -whether it be drugs, gambling, laziness, or all of those. I would be careful going forward if his work ethic doesn't change. If he has truly had a heart change, he will put forth the effort to work, and change will then be able to come for him.
Remember that even the Apostle Paul warned against those who could work and didn't, and used some strong words. Read
II Thes. 3 to see how Paul felt about those who didn't have good work ethics.
I will pray that the Lord continues to give you wisdom. We have dealt with a similar situation with a family member, who we have tried to help time and time and time again, and sadly had to come to the realization that until he really began to try to help himself, there wasn't much we could do along the way... but to pray!