Why breakups are so difficult?

Like, really. Why? Why do I feel like I'm dying? Why can't I find happiness? Why life has lost its colors? Why does my old life before him feel so far away, so distant, so rare? It's been a month, it has been pure hell on earth. I just don't know how I'll make it out of this, I'm so devastated.

Besides, this includes panick and anxiety attacks, therapy... how can it be so... dehumanizing? I'm only 18, I shouldn't feel like this... should I?