Rdb, you got many good advises, and you are having a loving heart. It was a right step you did! For to show him that you love him, but can´t live with his addicts. In this way you have to protect your child and yourself. My brother in law is an alcohol addictet, since several years. He dont see it and if somebody even mentiones this he becomes very aggressive. He´s family is suffeering under this. My sister is supporting him for to keep peace. From outside its terrible to see. She feares if she will not longer support him, he will comit suicide. Both dont want help!! So my sister is developing her own life with the son and earn the money for family. From human side I see no hope!
But I believe that so long a person lives, their is hope that our heavenly father can change this person !!
Do not give up, it may takes time and the future is unshure, but still in our fathers hand! I pray for you too.