Saying you’re slammed when you’re actually scrolling is a lie people can usually feel.

Being busy is the socially acceptable way to decline, which is exactly why it has stopped being believed. People notice the pattern over time, and the small untruth costs more than an honest no would have, because it tells them your time is unavailable rather than that you did not want to come.

Try the plain version this week: that you do not feel like it, or you need an evening in, or you would rather not. Keep it warm and short. If you genuinely want the rest, you are allowed it without inventing a reason that can be checked.