My only friend is me

I spent my whole life taking things very seriously. Took study seriously, constantly competing and trying to prove i'm good. Took relationship friendly, gave up things I valued and cherished, and then felt lost and disappointed. Took job seriously, exploited, exhausted and felt sour all the time. Then I suddenly now think, the key to happiness is actually to take nothing too serious. I always knew this but I couldn't let go of things. It's prob my five years in Australia where finding a job became an extreme and unprepared for challenge, where people saw that my English was not good enough and would tell my husband that if I was not gonna speak next time, don't take me to the next party. I am a bruised person. I feel I lost so much time and opportunities where I can live much more happy. I plan to change this, and forget about all those that make me unhappy, and live for myself.