Friendship is like an eternally spinning ferris wheel lasting seemingly forever, because it doesn't know when to actually stop! It knows for certain (when to stop). Only when based upon the choices made by the one's who are eternally tied by fates literal "knot of joy"! This literal knot of joy that fate demands friendship compatibilities upon is entirely unparalleled to something that was even given a choice to begin with. Meaning when an everyday common ferris wheel doesn't know when to stop... It's because fate designed the one who then designed the very invention of the very ferris wheel to give off the impression of a never-ending fated knot of joy! A testament to the joy one enjoys within their own "little friendship circle". Utterly bonded by a knot full of joy that's fated to last for an eternity! Except there's one entire catch here.... While it is in fact true an everyday common ferris wheel was literally made to go on and on, without so much as a (push of a button) made to seemingly stop otherwise. It's actually given to the push of the button of that very choice both guarded and decided upon the very individual who made that very choice to begin with. And who is also in a never-ending fated knot of joy within an entirely different individual besides yourself.
Conclusion... So in the end, it is choice upon one's very decision to (first and foremost) act against. Which is the breaking of fates very will to act accordingly to it's very "strategic" design, in order to see a never-ending source full of joy bonded by a single knot lasting for eternity through...towards the very end!
Then you hear whispers between the one who made that choice to begin with and their unsuspecting seemingly "significant other" who is tide deep into fates never-ending "knot of joy"! The one who made the choice politely asked, "how long do you think this whole thing (between us both will last for")...? The unsuspecting significant other responded in kind, "I'm not exactly sure... Forever if possible"?!