understanding

understanding someone seems to be impossible.

ppl talk to me about their problems.
i talk to ppl about my problems.

but, at the end of each 'deep' conversation,
the topic would be different and changed to something else.

why?
it seems like ppl care and understand.
but in reality, ppl don't.

seems like ppl are caring, but at the end,
they are talking about their problems.

i need help, but no one understands.
and when no one understands, no one can help.

is myself the only one that understands me?