Roller Coaster ride

Oft-repeated & pretty lame anology one always attaches to life. But, it is apt. Nothing else matches life more. I seem to be in the trough for a long time now. I do not remember when and how, but I somehow have lost some vital ingredient in the recipe of contentment. It feels as if God has triggered some "yearn" switch inside me and has forgotten to add the object/thing to yearn for. The mind is convoluted thoughtwise and empty contentwise. One content that I desperately tried to imbue myself with for the past two years is the feeling of love. One can say that I was not the most fortunate person in love but the real reason was I simply overlooked our incompatibility and inappropriateness of my intentions. The result is I find myself falling in a bottomless abyss, discovering new lows every day waiting for the end when I strike the bottom. But life's different. Dented pride, zero self-confidence, no motivation about anything, an unrequited love and a depression aren't the only lows it has to offer. How I hope to just evaporate out of this misery?