Dysphoria

dys-phor-i-a (dĭs-fôrˈē-ə, -fōrˈ-)

noun
1. A gloomy, miserable feeling.
Though I try to tell myself you aren't suffering anymore, it's me steeped in the dysphoria of a world, a life, without you.

Synonyms: anguish, dejection, disconsolateness, distress, dolor, emo-tastic, funk, gloominess, grief, heartache, melancholy, misery, mournfulness, sorrow, tribulation, woe.