I had a problem with meth a long time ago. I lost 2 years of my life and all my savings and everything I owned - I quit on my own and it was the hardest thing I've ever done and the thing I'm most proud of. I had a couple 'falling off the wagon' experiences during the first year because when I first decided to stop, I was still hanging out with the same people. I'd think, "I haven't done anything for a week (or a month) I'm cured now, I can handle it." and next thing I knew it was 3 days later and I still hadn't eaten or slept and I was calling my 'friend' at 3am.
Even now, 10 years later when I know how bad it was and how lucky I was and how proud I am to have stopped...if one of my old 'friends' stopped by and offered, I'd still be tempted. Because I'm cured now and I can handle it.
But there's a stronger part of me that knows better, so I don't stay in contact with those people. I wish them well, but I just can't be around that lifestyle because I know that one day I won't be strong enough to say no.
For those of you with family and friends who are addicts, I wish you all the best.