There is only one thing to do after a break up, move on.
Naturally that's easier said than done.
However it's gets better with time.
Surly there are other areas in your life you may have been neglecting due to your being in a relationship.
Now is the time re-focus your energy on those things.
But first you have to take note of some the lessons you got out of the relationship which will help you to make better choices in the future.
(Each of us chooses our own friends, lovers, and spouses.)
This is a fact none of can escape.
Our lives are the results of choices and decisions we made.
Ideally over time we gain enough experience and wisdom to make better choices for ourselves in the future.
The key thing is to know what it is we want.
"The world may not owe YOU anything but YOU owe yourself the world!"
Best of luck!