I am with Mike and LaTeeDa, those were my reasons for staying. Giving up the dream is hard. I struggle with it everyday, and I don't understand why we built this dream together and then he did nothing to ensure that it happened. Well, actually I do understand, I just don't like it....maybe that's a better way of phrasing it.
If you stay in this marriage, please get into Al-Anon and your son into Ala-Teen. You both will need some support and tools on how to effectively detach. These conversations you are having are doing nothing but upset you, and validate the crazy reality that he lives in - designed to suit his own ego needs and protect his addiction, by the way.
Take good care,
~T