He will not get better without professional help, and may not even with it. Why is he living with your mom? Is he broke? That’s a sign. Lying, manipulating stealing, missing work, personality changes, secretiveness, stories don’t add up. Trust your gut and get him out of your moms house. I’ve tried for 20 years to help my sister: 3 interventions, treatment, I helped her through school and helped her get a good job. She was supposedly clean for the last 3 years. Then last month she hose sat for me for a month while I was on vacation. She robbed me blind. He has to want help.