Purpose in life

Why are humans created? Why is there life? What is the purpose of even being alive, and being yourself? These are questions I ask myself after watching an anime today.
In that anime, a guy had no purpose in life. But his sister, who lived in an hospital her whole life due to her sickness, had a purpose in life. She wanted to explore the world and learn new things. The brother often brought manga for his sister to read in the hospital. His sister would give a bright smile and thank him. Then he decided that for the Christmas which was coming, he is going to bring his sister out to explore the city- whether the doctor allowed him to do that or not. He then started taking up numerous jobs, and decided to give his sister the best Christmas ever.
They had fun the entire day during Christmas. But shortly after, the sister died as her condition deteriorated. The brother then realized that his purpose in life was to buy that book of manga every month for his sister, and the smile that she gave him was what spurred him to continue living. He thought that he realized his purpose in life too late, but no. He decided that his new purpose in life was to live the fullest he could, in the place of his sister. But in the end, when he finally got his scholarship, he died in an accident.

When I watched this, I asked myself, why am I living? What is my purpose in life? I have no idea. I have no ambition, so I just pass a day as it is. I have no idea how it means to live for a purpose. To me, living for my family and friends are not considered as life purposes as they will all leave me one day.
But I don't dare to think too deeply into it. Even though that is my character, and I was just born with that personality to think deeply into things, I just couldn't bring myself to think further for this matter. What if I realize that I really have no purpose in life? What should I do then?
But that doesn't really matter now I guess. I think I just have to focus in my studies now and nothing more :) why pressure yourself about this now? There's just no point. (that's for me, as I really have no purpose in life. But not u guys out thr!!!!!)

But to all those people out there, I urge u to think about it. I hope that u would have a meaningful and awesome purpose in life. I dun want u to finally find out ur goal one day and then ends up like that anime character. It would be just too sad already. So, find out your purpose in life now, and fulfill it the best u can! I dun want u to have any regrets!!!! Good luck!!! :D

Gotta go now,
Ciao ciao ;)