Can't offer much in the way of separation advice, but I will keep you and the whole situation in my prayers. From the few interactions I've had with ya, you seem to be a level-headed guy and I'm sure it will all get worked out, some way. I have many friends going through the same thing -- seven year itch and all hell breaks loose. No winners or losers in this game.
If possible, maybe sell the other vehicle and keep the Crossfire for yourself? You'd struggle to ever find another SRT in as good of shape as yours is in, and there's no rule dictating which car you keep. They make great daily drivers, and you have a few months before you have to worry about snow. The SRT roadster is an eye-catching car and would be useful to snare the rebound.
I wish you all the best bro... chin up.