I have witnessed a friend going out again this week, and with some distressing consequences. It is gut wrenching.
However it has hardened my resolve, and actually helped me to realise the true and significant pain I caused to others. Which of course I knew, but did not fully understand.
I think that is was only with a real desire to stay stopped, hard work, coming to self understanding and making significant change within ourselves with the help of counsell and support that we can truly remain and embrace sobriety.
Through whichever path(AA or other).... I hope your friend finds his way to his own lasting sobriety and a better life.