Just keep going regardless of how you feel about it. The evidence your looking for is in those around you who are clean/sober for many years and you can bet your bottom dollar many of them drank like you or worse.
Bread and butter of 12 step recovery is meetings, sponsor, talk to other members and as your in a 12 step program actuall go through the steps wth your sponsor.
Recover is possible we have to work at it on a daily basis though