I would try and temper your always saying yes, but also embrace it. It is who you are.
My wife is like you, she volunteers for everything and is always busy and stressed. However, she also hates sitting still and loves to be social so in a lot of ways her life is way more interesting and social than mine is.
I always say no and while I am well rested, I also miss out on a lot. My wife is always under the gun, but has more friends and rarely misses out on anything.
The grass isn't always greener on the other side of the fence.
I am Anton Zdravko Martin!
Best meet lifts: Sq 150 Kg (330 lb), Bench 120 Kg (264), DL 160 (352) @89 Kg (197)
Best gym lifts: Sq 375, Bench 275 (pause), DL 370 @205 or less
Goals beyond my wildest dreams, 600 Kg raw total, 200/160/240
Hack away at anything which isn't essential. Do what you love, and do it often. Fazc.