Thanks!

This means that you felt sorry for the person and didn't want to wake them.

"You looked so peaceful and had driven so many hours that I didn't have the heart to wake you for breakfast, but I brought you a muffin and a coffee."

Кстати, "hadn't the heart" немного устаревши. в наши дни чаще всего говорим: didn't have the heart to...

Ты так сладко спал(а) и столько времени провёл(а) за рулём, что я не решилась(лся) разбудить тебя к завтраку, но я принёс(ла) тебе булочку и кофе.

Thank you, Tatiana! Next time please pick a gender and stick with it - all those optional forms are distracting and I have to remove them when I enter your examples in my notebook 🙏

Всегда рада,Улий! Океюшки!☺

😊