This would have been so much better without the person in it and maybe B&W. The person seems so off to me because this is a very old graveyard that looks completely overrun with weeds. Why someone would be mourning at a grave that appears to be 100 years old does not make sense to me. Without the person (but keep the rose) this could have been one of my favorite.
Very poignant. For the happily married, one train of thought you avoid is the time when one will have to go on without their spouse. This image hits a bit too close to home.
The single rose is a nice touch. But her posture is also saying so very much - not the immediate denial and shock of loss, not the angry questions of why, but the sad acceptance of the situation combined with a sadness of the loss of what was. Maybe even the power of love reaching across the gulf of death.
I love all of this... except for how much space her back takes up. I see your reasons for not showing her face, but maybe if she were sitting a little more to the right... it might be a more pleasing composition. I dunno...