I think we're all deluded--and I'm not talking about only alcoholics and people who live with them.
Human beings have fantasy images in their minds all the time about who they are, who other people are, how the universe "works".
I don't know that it's possible (unless you're a buddha) to have a completely delusion-free life. To the extent we can recognize delusions and replace them in our minds with reality, we suffer a lot less, IMO. The delusions can work just like booze--allow us to pretend that what's there isn't really there, or that something isn't there that is.
I'm not a Buddhist, but a lot of the philosophy of Buddhism really speaks to me.