I think you need to ask yourself if you are willing to take the risk. He maybe on the path to true and life long recovery, but he may not be and fall of the wagon sometime in the future. If you want to take the risk are you healthy enough to see if things are not going down the path of recovery and to be able to not be a codie? I would say think long and hard and take baby steps if you want to try a relationship with this person. 40 something days is tiny... I think I would be wanting sustained recovery for 6 months to a year before I would even think about getting fully involved.