This may sound like a stupid answer. But if you are asleep and you aren't dreaming. I think that means you are emotion-less. You aren't aware of what's going around you. Nothing really bothers you. Your mind is at rest. At least temporary.
Don,t we all sort of ripping out our hearts and thoughts i am afraid that is something we all have to deal with in life,but if you do find a medical answer apart from antidepression pills let me know. happy hunting
Emotions are what set us apart from every other living species. While the ones your are currently experiencing may not be the ones you wish to have, detrimental patterns of thinking can be altered using CBT.
The beauty of the brain is that it never stops working; even during sleep.