Serencholy

The realization that at some point in your past you may have crossed paths with the person that could have made you absolutely and utterly happy to have created a once in a life time relationship with—a perfect soul mate with whom you could be ultimately happy being a completely unfiltered version of yourself with—only to realize that the likelihood of ever crossing paths with this person again due to the utter magnitude in size of the Earth, the impossibility of discovering some effective way to ever make contact with them just to have the possibility to strike up the conversation needed to ignite the spark, and the absolute randomness required for a second encounter to ever happen again is something that would rely on a level of luck that becomes increasingly infinitesimal in odds against you as time passes and distance grows between the very spot you might have made contact in a brief passing.