A marathon

How can something so simple be so tiring?
It has reached the climax.
Now it is slowly declining.
Like every story line.

It is getting harder and harder.
We both started running at the same point.
But throughout the way, one might leave out the other.
To reach the finish line together now has become a question mark.

I might get too tired in the middle.
And decided to give up.
But what do i do?
Run back to the point where i have started?