Saying, worthless getting sad over something just show how ignorant you are. People are built differently. Our heart, our feelings is not a stupid damn rock beside the road that you can kick whenever you want.
It’s a delicate feeling, a delicate store that full of emotions. Caring too much means you’re standing at the highest place, waiting the time of your downfall, and when it hits your lowest point, game over.
Either it becomes a flat line or the other way around... time flies. You just need to suck it up.