This nagging thought

Ever since I graduated from secondary school, I've always had this nagging thought.

What do I live for?

I have no answer. I had no answer then, I have no answer now. I just don't feel for anything so strongly that I live for it. It's like I wouldn't mind if my life ended now or anytime cus I don't have anything to live for. I wouldn't seek death but I wouldn't mind if my life ended. But I'm scared when I think of death.

Sometimes, I just feel like I am going through the motion. Like majority of people, this will likely be my life:

Study --> Go to University --> Graduate --> Get a job --> Get married --> Have kids --> Grow old --> Retire --> Die

I will be this small dot in the crowd.

I don't know why I feel this way but I do. I wonder if anyone feels the same? Sighhh