How tragic Hesh's life had been. The death of his brother and father had haunted him. The only family he had was gone.
All accept you. You were his world. You were the only thing separating war from home. He loved you, and he wasn't going to let you go.
Until you were also hunted down and killed, while he was distracted with the rest of his team.
It destroyed him mentally. He had lost everyone, everything he had ever known. The sorrow, the depression, the pain of missing you was too much.
Until one day, when he couldn't take it anymore. Grabbing the gun out of the cabinet in the kitchen. Sitting there, scanning what would be the last of his surroundings.
It was suicide. But it was suicide for you.
And during his funeral, his soul was finally allowed to roam. And, there, now as a ghost, he sees you. You had been reunited with him through death. And you'd spend the rest of your afterlife together.