Age teaches that being invited somewhere and needing to attend are different things.

The invitation is a piece of information, not an obligation. Somewhere along the way you learn that you can be glad to be asked, decline pleasantly, and nothing bad happens. The fear that saying no costs you your place turns out to be almost entirely unfounded.

Decline one thing this month that you would have attended out of reflex. Notice the actual consequence. It will be smaller than you predicted, and the evening you get back is worth more than the vague credit you were protecting.