How does emotional pain cause as much suffering as physical pain?
Some research that I have dug up:

According to the article "Emotional and Physical Pain Activate Similar Brain Regions" (Fogel, 2012), the anterior insula and the anterior cingulate cortex are activated for both physical and emotional pain.  Also, physical pain can lead to emotional pain as it would in the reverse direction (emotional --> physical).

This conclusion is further discussed in the articles "Does Rejection Hurt? An fMRI
Study of Social Exclusion" (Eisenberger et al. 2007) and "Social rejection shares somatosensory representations with physical pain" (Kross et al. 2011). Even though both articles use the insidious form of bullying: social exclusion as an example, the same conclusion could be reached for proportionally greater pain of both types.

What I alluded to in my comment is true, I have fallen from a decent height, both emotionally and physically in 2 separate incidences - reflecting on what I remember of the pain I felt when I landed, it was about the same.