I know what you're talking about, my W lives in the same house too, but she's millions of miles removed--shejust doen't think I know the truth, but, regardless, there is hope--just try to shift your focus a bit, hope for the things that you can change, that you can do, that you can make a difference with. Do for you for a while.
I've really had to change my focus in the last while--most dramatically in fact. I realize that my children still love me very much, that my nieces and nephews think I'm wonderful, that even my W's family has deep respect, love and sympathy for me, for what my W's been putting me through. I know my own siblings are there for me--every one wholeheartedly there to support and love.
There's always hope. I echoe the advice "Act" don't react. If anyone deserves to give up it's me; well I'm giving up on what I now know I absolutely have no control over (that's just a huge waste of energy), but my situation may be a little different than yours, but the feelings weren't, I've just realized that my efforts will be much better utilized focused on me now, on my children now.
Hang in there "Things are gettin' better" if you can just refocus your efforts somehow.
