I hold my breath and walk this fine line every day between being "ok" for db and worrying that my H will then decide to cut support to me. So, I know a bit about the feelings you are having. Aside from the betrayal, it cuts right to one's sense of survival. To have one's emotional life turned topsy-turvy is bad enough but to then have to worry about your basic needs at the same time while someone else blithely steps out into his shiny new world is just a horror.
My thoughts and prayers are with you. I do hope that we might get together...stategize, sympathize, exercise, exorcize and/or maybe watch a movie or two!