If what I am, as I am, the person I take myself to be, cannot be happy, then what am I to do?

You can only cease to be -- as you seem to be now. There is nothing cruel in what I say. To wake up a man from a nightmare is compassion. You came here because you are in pain, and all I say is: wake up, know yourself, be yourself. The end of pain lies not in pleasure. When you realise that you are beyond both pain and pleasure, aloof and unassailable, then the pursuit of happiness ceases and the resultant sorrow too. For pain aims at pleasure and pleasure ends in pain, relentlessly.