"What is more rare and more valuable than a diamond, but easier to lose?"

You, my love.

You read the letter at the random box inside your doorstep and only to open it to see a very expensive diamond necklace. You didn't need to think just to know it was Your ex. Edward Nygma,The riddler- you broke off things with him because it just didn't work out. Constants fights and stuff- it didn't help when you figured out edward was the riddler. Since then he'd been trying his best to win you back.