I'm confused where the unopened photo equated to him not caring, him not feeling love towards you, him seeing you as nothing to him?

Sometimes, shifting perspectives is necessary. There's a wealth of grayness, when life is busy, etc.

How exactly is he supposed to help, when an unopened photo is a catastrophe, and proof that love is gone?

Nvm, means nevermind? I'm confused how asking if he had seen the photo, nvm was his answer? Sometimes it's easier, to stop, pause, breathe and ask for clarification before jumping to a panic stricken conclusion.