Don`t beat yourself up Havehope,you are doing your very best to battle through both codeine and alcohol.The fact that you are even in this forum is mega testimony to your willingness to ditch both.I have been where you are right now and can tell you with 100% certainty that it can be done, you are most certainly not a failure.
For a long time I felt a hole where both codeine and alcohol had previously lived,I am still struggling to find something to fill that hole.My current addiction is Diet Coke,and I am not even joking.Some of us have the personality type that seem to need something /anything to over indulge.This is not our fault or weakness,but,you are super strong and will get there .
Take care