Partner in rehab

I'm not sure which section to put this in so I will put it in both. I hope that's OK.
My partner is currently in rehab. I am so proud.
My issue comes in that my mental health is now suffering.
I have spent the last 8 months supporting him and separating the person from the addiction.
I now have his debts (in my name) to maintain while he works on himself.
I'm falling apart. The rehab don't want me calling there as I think they think I'm crazy. I have no idea what happens now.
I've turned to online support groups only to be told he probably.won't come home to me.
It's like his addiction has just passed it's pain on to me. He gets to get better and have so much fun and freedom and I'm still trapped in its grip.
I know it wasn't always perfect but he supported me too and now I'm scares to message him in fear of hindering his recovery or pushing him away.
I don't know what I'm asking. Just how do I cope? Has anyone else been in this situation?
I want the opportunity to spend time with the person I know he is outside of his addiction. To have the future we planned.