In solitary halls I wait, sought in acts of fate,
on the brink of lonely minds, on the thoughts of those who wait,
you find me when in life you hesitate, or in the darkness delve,
if you are kind to me I dissipate, if you ignore me I do swell,
many know me through angry words and jealous lovers,
i wear many masks and see through others,
selfish, selfless, I am both,
crippling, relieving, often morose,
I am found when you are lost,
Morbid, sordid, sometimes described as dross.
What am I?