Asharin: You are going to do this even though you have yet to get confirmation that it is a good idea.
Your recovery is a journey just like it has been for all of us who have posted here. Please remember that no matter what you are welcome to keep coming back here for reading and posting. Also, it is very important for you to find and go to face-to-face meetings of Alanon and/or Naranon (many of us do both). This will not only help you but it will also help your son.
Again, welcome to the world of recovery!!
BTW, what your son is doing right now is called fragmenting - that is, he talks to you and you believe him instead of checking it out with the other people in the story (in this case, the people at the treatment center). I'll bet that when you think about it, for a long time he has been telling you this and that about his woes and you have not (or could not) confirmed the story with anyone else involved yet you believed him. It is an across-the-board behavior coming from the addicted brain. Those of us who have taken a front-row seat to someone's addiction have come to believe (by trial and error) that it is true when they say, "How can you tell if an addict is lying? His lips are moving!"