TillyWhizz You can do it - say 'no' that is! Yesterday, I amazed myself by actually managing it! After spending most of my life bowing to the will - and whims - of others, I've finally had enough!
The situation wasn't a 'caring' one, but still necessitated a definite 'No'!
I was expecting a service engineer to call at mid-day, but the company rang at 9.00am to see if he could come at 9.30am instead. I was on the verge of saying, 'Yes, that's fine', when the penny finally dropped. It was OK to say, 'No, sorry, that's not convenient.' I agreed to his coming at 10.00am, as I was quite happy with that time.
A small step, but one that I'm not used to taking!