Hi and welcome DupedBoy,
I'm sorry for what brings you here but this is a place of great support.
I can;t explain what happened - we might all share a common problem but not all addicts or alcoholic are exactly alike.
I know it's painful (and bizarre) but the bottom line is for better or worse she's made this choice.
It doesn't sound like there's much left in this relationship for you as it stands.
I think you definitely deserve better and I really hope you find it.
D