Thanks, Teacher Camille. It is very challenge for people pleasers to say no, in part for the reasons you cite here. There's probably some neuroscience involved, too... maybe it releases dopamine or something when we say yes and another person likes that. (I am not an authority. Speculating here.)
As for busy-ness, certain kinds of people take pride in how many projects they can juggle, but as a way of life it's unhealthy. I once wrote about this because it was my own tendency. It dawned on me one day that professional jugglers do their juggling for brief periods, not as an ongoing grind. Here's more on that insight I had: https://medium.com/swlh/being-a-skilled-juggler-is-not-a-good-career-strategy-512774abcd01
It is better to underpromise and overdeliver than to constantly be dropping the ball and letting people down because we can't say "no"....
Thanks for sharing.