Stay gone for a while at least... give her a taste of what divorce feels like.
But man, you gotta control that... I won't go over the details, you know what happened and you know where things went wrong.
See if she sends you an text messages or anything... she might try to prod you to come back. This woman likely has depression OIN, you gotta treat very carefully there is all... She's not a bad person, the chemistry in her brain is out of balance and it makes it VERY hard to feel anything other than miserable... its not her fault she's got chemical imbalances so you gotta just let it go.
Don't make jokes, that's the best strategy... it is WAY too easy for someone in her mental state to read them cynically and then an argument starts... once it starts... you are dead in the water.
And while that may have sounded funny at the time, its kinda teasing... which is an aggressive joke. If you are gonna play, don't make it at her expense... I know that's not how you meant it, but that's what she's gonna hear. My wife has depression/anxiety too... I know how someone with anxiety or depression will read those jokes -- badly.