Hi , you in my opinion did the right thing by confronting him and keeping to your rules which if he broke had consequences , we have had the same situation many times and asked my son to leave the house , only me having him arrested and calling the mental health team did he start to respect me and my husband and the rules ,
My son lived in a drug squat for a week after he left but soon came home , with the rules agreed , short lived though , but I felt empowered when he walked through my door again
Keep doing what your doing , it’s hard but stay positive, you will become stronger each time , I have , Iv been through hell but seeing a light in the distance xx