Why don't people talk about platonic heartbreak more?

Like all of the attention goes to romantic love, but man... I feel like the ones that have just punched me in the gut over the years are just the friendships. 

The kind that when you think about them even months and years later you still get bad butterflies. 

The kind that makes you afraid to try to be close to somebody again because you fear the same thing will happen. 

Being so anxious and cautious about them just leaving again. 

Them still being there sometimes, but knowing it's never going to be the same with them again.

 feeling like you can feel when it's going to happen. 

It sucks, and it hurts, and it's not treated like it's serious.