Probably a good idea! If you're not ready to attend classes etc. then you probably aren't ready for a 3 month stay in a rehab either! Also I can't emphasise enough how important being ready to go is. I really, really regret going when I did. I was basically coerced into it - I was living at my Mum's, she had had enough of me stealing/using/lying, so she gave me the ultimatum that I had to see if I could get a rehab place. I did it just to make her happy, not expecting I'd actually get it, and then when I did get it my decision was basically go to rehab or get kicked out & be homeless. I knew I wasn't ready to quit. I went to rehab with a vague half-hearted decision to give it a go, ended up staying 7 months and was convinced I was done with drugs, then relapsed basically as soon as I could, and now it's highly unlikely I'll ever get to go again. I think I would have gotten so much more out of it now and wish it was still an option, so don't do what I did! Only go when you're really desperate to get clean for good.