positive thinking is...?

what is positive thinking??
can it be...
when the bird shit on your head, u thanks God that Elephant won't fly?
when u are alone, u glad that u hv more personal space?
when u hv nobody to love or to be loved, u happy that u can survive by urself?
when u found ur mistake, u appreciate that u still hv space to be improve?
when ur bf leave u, u find tat u can hv a better one after crying for 3 days?
for me, a quite negative person, i always hope that i can hv positive thinking all the time.
But start from today, i will start to practice how to become more positive, to make it bcome a habit, and a habit is formed by "pretending". Pretend that i m a positive person, pretend tat i m always happy, pretend that there is nothing to be afraid of.
Yea, when the "pretending" bcome reality, here is the way i can continue my life journey happily.