Hellen once again taunted me, posting a photo of her and Mathew in bed, the intimacy of the moment practically oozing from the screen, visible only to me. My stomach twisted violently at the sight, a wave of nausea crashing over me. I rushed to the bathroom, the world around me blurring as I retched, the contents of my stomach spilling out in a frantic stream for three agonizing minutes.

As I leaned over the sink, the cold porcelain pressing against my skin, I caught a glimpse of myself in the mirror. My eyes were hollow, as calm as dead water,I realized, with a sharp pang of despair, that I...