Lol - I read one once when my vet was isolating. It was called Snowbound with A Soldier. Apart from a couple of thousand yard stares and a couple of gruff "You wouldn't understand!" type comments the hero was as passionate and romantic and open as any other cardboard Prince Charming. All it took for his "walls to crumble" was a couple of kisses in front of the fireplace. And they lived happily ever after...
I would have thrown it across the room into the damn fireplace but it was on the Kindle App on my iPhone...
I'd love to see a more realistic piece of fiction. Not necessarily considered a romance, but a relationship driven novel - I guess they'd call it chick-lit. I've often thought if I had the time I'd write it myself. Not sure if any publisher would touch it though. Between the angry outbursts, the co-dependency, the suicidal ideation, the struggle to get meaningful help, the isolation... Also not sure how to construct a narrative arc from the demoralising grind of the endless cycle of PTSD - just when you think things are going well you end up right back where you started.