you're already far more than your father ever could have been (from the way I see things) if you know you need help and you're willing to get it. she obviously loves you as much as you love her, and things will be tough (they're always tough, right? lol) but if you do take the steps towards getting clean and telling her about it, then there can only be good things in your future <3
(I hope that made sense? i haven't been making sense lately)