I love so and so, how can I let go of them? You don't have to. You do whatever you chose. What you think, you become. Your thoughts are strongly affected by those you are emotionally open to.
It is remarkable that Providence has given us all things for our advantage near at hand; but iron, gold, and silver, being both the instruments of blood and slaughter and the price of it, nature has hidden in the bowels of the earth.