I went to rehab and my boyfriend did too. The thing you have to get is that some of the treatment is almost like brainwashing and some of the places expect you to take in EVERYTHING they say.
If you don’t accept their beliefs 100%, they tell you that you will fail. If you’re honest and take what works for you, it can work. The problem is that you have to be honest with yourself and not just take in the stuff that sounds easy.