You'd be fine with your ex breaking up with you to forget some other guy like a week later?
Why does it matter to you? You're just feeling upset because of chemical reactions.
Look outside and count the stars. Each star has tens of planets orbiting around it. Each star is in a galaxy with 100 billion planets. Some stars are dead, and devoid of all potential life. And that's just our observable universe alone.
Don't you think your issue is trivial compared to it all?