You can't look to anyone else for the discipline you need. Do the right thing.
In Detail
They say that children need discipline in order to be happy and healthy -- and grownups need rules in their lives, too! You won't be able to look to anyone else for the guidelines or the positive reinforcement you're looking for right now -- you will have to give yourself the discipline you need. You know what the right choice is, so force yourself to make it. If you let yourself off the hook this time, you will probably regret it (or at least feel guilty for a long time).
zomgg this sounds so much like my daddy it's freaky! O.O