Protecting your peace will cost you some invites. Check the receipt: it was worth it.

Any real change in how you spend your time removes you from some rooms, and that loss is genuine rather than imaginary. Fewer invitations is what it looks like from outside when somebody stops being endlessly available. The question is what you got in exchange, not whether anything went.

Notice the quieter weekend instead of pretending not to. Then look at what it bought: sleep, a finished thing, an evening you actually wanted. If the trade does not hold up after a month, change it, and if it does, stop apologizing for it.