No one can escape pain in a lifetime, and the only difference is who can cope with pain more. You can use pain as a kind of grinding, a stepping stone, an experience that helps you grow, or you can sink from it, indulging in inferiority and self-pity every day and unable to extricate yourself; these are all in their own choices, different choices, and different lives.
Therefore, life is short, enjoy happiness when there is happiness, and create happiness for yourself when there is no happiness.