On the flip side of that, I will run from anyone that gets into a relationship and tries to change me or make me over in any way shape or form.
Your time may be better spent doing some introspection and finding out why you find yourself in a serious relationship with someone you knew was a drinker.
Your choice is to accept someone for who they are or don't.
You can't and shouldn't be the one to change anyone else.
That's codependency.