Here's something, I agree with you about the Catholic faith. Same goes for AA or NA meetings. I got more out of rehab than I ever did from going to church every Sunday and reciting lines. I would never tell anyone to they have to agree with everything preaced in an AA or NA meeting, some of the group think I belive can be harmful. but you can gain some great insight into yourself and understand how your brain works to bring you down and back into old habits. Once I understood how the addicted brain steam rolls the thinking brain a lot more of my ways made sense, I knew why I had bad habits and it wasn't because I was weak. Not only with substance addiction but everything else that lead me to errant ways of life. Try a meeting somewhere and listen to other people's stories even if they don't match your situation, at least you won't feel so alone and know others that face similar challenges.