Letting herself go was the hardest thing she ever had to do. It was for her people, the world. But although it was thousands of risings ago, she still could not completly forget the anguish. What she had gone through, put him through. Yet she had no regrets. For without her sacrifice, the world would have fallen out of balance. The war would never have ended; the Fire Nation sinking the world into deeper and deeper turmoil. And, she knew, that he had moved on, found new love, and that his heartbreak nothing more than a fading memory. She had moved on as well, yet although the suffering she had inflicted upon others when she became the moon could be forgiven, she could never forget. Her father's cries, the single tear that had been shed by her first true love. But none of that mattered now. The suffering she had prevented would have been far the greater.
Sorry if this rambles a bit. It just popped into my head at 3 a.m. and I just had to get it down or it would drive me nuts.