Saving the World to Save Myself

"After being accepted into Doctors Without Borders, I handed over the position of Chief at the capital’s hospital to Elaine Brown.My best friend frowned at me. "You’re destroying any chance of a future with Jeffrey if you go.”I gave him a faint smile. "I'm just returning him to the woman he's always had in his heart."In my previous life, Jeffrey Carter and I were the infamous bickering couple everyone in our circle knew to avoid.He resented me for refusing to replace Elaine when she applied to join Doctors Without Borders. She later caught an infection and died on the job.I resented him for his hypocrisy. If he loved Elaine so much, why did he agree to my parents' demands to care for me for the rest of our lives?We spent seven years of marriage together, yet the best we ever wished for each other was a miserable death.However, amid the gunfire and chaos on the battlefield, he used his last ounce of strength to shield me completely when his heart was pierced by a bullet."I've arranged for someone to meet you. Once the sweep ends, run. You must survive!" he whispered, his voice fading. "I'll protect you fully in this life… and in the next, we’ll never meet."Elaine, I'm doing this for you."However, the bomb dropped from above gave us no chance to escape, and we were both annihilated.When I opened my eyes, I had returned to the eve of our wedding.Jeffrey… In this life, I would fulfill your wish."