He's still got you if you're still reading his texts and giving him the attention he craves.
he has to find his own way.
you have made your boundaries clear but it's up to you to enforce them.
Go NC.
If he decided to get help, and do the work involved in recovery....THEN contacts you knowing who he is, how to handle his feelings and has his life in order...still while attending a program and working on recovery ....then and only then do you stand a chance at a healthy relationship with him.
GL! I am so proud of you for walking when it became clear that he wasn't going to change. Many of us wish we had.