Like I said before Paulette - the rate of divorce amongst cancer patients is real damn high too. It ain't just us. Modern marriage should really have more realistic vows - like "we promise to let no other come between us, unless they are just smokin' hot, and we will stay together as long as it is convenient for everybody."
There's lots of dumber reasons people get divorced. There's no need to beat ourselves up over this. Being TS mostly means you'll get divorced. It's not any more reasonable to expect us to have foreseen this in our past than it is to blame a cancer patient for getting cancer.
Shit happens, partners bail, end of the story. Sucks.