how to understand these ?

i have never been able to understand the concept of breaking up.
i do not understand the concept of discarding a person or people from your circle of relationships.
i do understand the concept of transforming a kind of relationship to another.
but still i can't understand the concept of disconnecting connections and linkages we have to others...
man !!! why do other people can do it so easily ?
and why do other people even have the will to do such things ??

two feet

Left foot: Gita’s foot
Right foot: Kiki’s foot

Now, relativity does indeed matter… is it that Gita’s foot seems to be too big ? or Kiki’s foot seems to be too small ?