Half-Way House Husband

My husband recently went to rehab and has 12 days left in his program he called me a couple of days ago and told me he going to a sober living house after rehab where he will be placed with a job and pay rent to live he hasn't said anything about ever coming home, I want to support his rehabilitation and do not ever want to express how truly concerned I am that he's basically moving out, I asked him how long he would be there and he said he was going to live there. I honestly feel like I'm losing my marriage and I feel so low I can't keep control of my emotion and than become upset with myself for being so selfish I just don't know what to do.