Unending Cycle of Pain

How much... just how much pain does one has to bear?
Life feels like an unending cycle of pain where you just have no idea how to release yourself from it
When you are so happy that you pray for the time to stop, sadly it doesn't stop and our fate tells us not to be too conceited because nothing in this life comes free
Happiness is something very short-lived and we should seriously learn how to embrace it whenever we get it
I personally have stopped believing in happiness, because it has always been preceded by immense pain
Hence I am always skeptical whenever something good happens

Anyway...
I have no idea what to do..
It hurts so much that you either feel like killing yourself or breaking down everything you see in front of you.. but obviously we cant indulge in such extreme activities at this age
Trying to move forward in life , achieving a lot, gaining success and everything
But the emptiness still remains
Its like you have lost a very important part of you... and no matter what you do.. you just cannot recover it... can never feel the way you once felt

Time goes on... Its been so many years already that you feel like you have gotten so old
but the wound is still as fresh as ever... reminding you to never forget it
And what do we learn from life?
To never depend on anyone except our own selves
Because even the sweetest people are toxic for your life from up close
They are the very people who claim to love you the most but end up putting you in worst state possible by their selfishness