He definitely needs help in coping with his feelings. He is hurting everyone around him. I am glad he refrained from using again, but he needs to find a better way to let his feelings out. I am a firm believer that working overnight is hard for everyone especially the person working it. It changes a person and it is unnatural to our bodies. Are the kids there when he is trying to sleep? Is he is taking care of them during the day? Kids are tough too especially when they are young and at that age where you cant take your eyes off of them. I hope you are holding up ok through all of this.