I have started to get better at accepting that I need more alone time than other people. I used to give myself a really hard time about it, all.

Some things that help:

-Learning to find 'alone time' around people. E.g., the gym or some other kind of physical activity. Not sure if you can get your partner or friends or whomever into something like that. If they are then able to put their headphones in and ignore you... So you can be 'solitary together' insofar as that makes sense.

-The whole 'solitary together' thing... Fostering that. Some people... You can relax around. Be quiet / silent with. Other people are more 'high maintenence'. Demanding of your attention...

Perhaps different people are different... What is it about people that you find exhausting, do you think?

For me... It is that I find them highly salient and I find it very hard to ignore them so I can focus on me / what I want / need. Which means I get out of touch with what it good for me which is draining / exhausting for me....