Everything that has a beginning has an ending. Make your peace with that and all will be well.
Starting out a new school year today, all I can think of is being done with high school. Which, honestly, does not sound that appealing to me at the moment. I'm sure that as it comes sooner I won't be able to wait for it, but right now, I am perfectly happy with where I am in life.
So for now, it's on the beginning.