It is intentioned that we experience the contrast of this existence alone, no one can possibly know what another experiences fully, our inner adventures cannot be told, they can only be lived.
As humans we come together, sometimes briefly,sometimes forever, that is intended, necessary, to share, to learn, to grow, to teach.
Most of what we experience is worthless, pointless, we make of it what we want to. Many cling to it, the pointless stuff, they miss the real stuff.
We are one, everything is a part of the same, 'it' has divided to experience the contrasts to the very last. When we come together it is so beautiful.