Go out for a walk. It doesn’t have to be a romantic walk in the park… It doesn’t have to be a walk during which you’ll have multiple life epiphanies and discover meanings no other brain ever managed to encounter. Do not be afraid of spending quality time by yourself… That doesn’t make you antisocial or cause you to reject the rest of the world. But you need to breathe. And you need to be.
Recommended reading: The Myth of Sisyphus and Other Essays.