rb...sorry to hear that this has happened.
If I may, I'll tell you what I've told countless young men I've written over the years when they have poured their hearts out to me about a cheating spouse/gf etc. It always breaks my heart to hear about this kind of thing and some of the stories would curl my hair...if it wasn't already curly.
It won't take away the pain you're feeling at the moment, but the best "revenge" is living well. Take care of yourself, keep yourself focused in all ways.
I bet someone will probably be along shortly to suggest you do extra PT, since you mentioned preparing for SFAS.
Not making light...just that a little levity sometimes helps... Good luck and stay safe.