I used to believe in destiny. When I was younger (in my 20s and 30s) I felt that certain relationships in my life were fated to be. These were dramatic relationships with equal parts elation and turmoil. In their time, each relationship was The One. Until they weren’t.

Nowadays, I think destiny was the artifact of bipolar disorder. When one is elated, one believes in destiny, a shining path toward a happy ending. One never gets the happy ending, because one is stretched to an irritable attenuation, and then goes skidding into depression. Destiny dissipates in depression.
Nowadays (with age and medication), I don’t believe in destiny. I don’t want to believe in destiny. It is a destabilizing influence. I would rather have this mundane life without destiny. I can read about destiny in books, where it is safely captured in the pages.