I have a question.

I live for the short bursts of happiness, unfortunately then I plunge into a deep depression for months. Until one, mostly insignificant, thing occurs to bring me out. But then it passes by faster than it came. I’ve been enduring this for 11 years so far. I guess my real question is, does it ever stop? Is everlasting happiness unattainable, a concept created by those deluded or require faith?