a relationship between two people is just like a clap.
like they always say...it takes two hands to clap..
you cannot produce a clap with only one hand can you?
when two hands do not come into contact with each other, a clap cannot be produced...just like in a relationship..without two people..one cannot happen.
when one hand tries harder than the other, a dull sound is produced...in a relationship...when one tries harder than the other, it remains dull and stagnant, and is almost pointless.
hence...a good relationship can and will only occur when both parties put in an equal effort...likewise..a resonant clap can only be produced when two hands cooperate.

....so would you choose to be the hand that tries...or the one that refuses to?