Among the numerous Bell Buddies that you may have, your Bell Buddy Forever is the one that you know will always be your most steadfast Bell Buddy, who will always make a Taco Bell run with you, so long as they still have breath in their lungs.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Among the numerous Bell Buddies that you may have, your Bell Buddy Forever is the one that you know will always be your most steadfast Bell Buddy, who will always make a Taco Bell run with you, so long as they still have breath in their lungs.