I will comment on the thousands of strangers part.
The only way to get back at feeling well about that, is actually putting yourself in the situation again.
About a month ago, I went somewhere where there was thousands of people indoors, unvaccinated, vaccinated, didn't matter. Not one mask in sight. It was my first time feeling pre pandemic with that many people maskless.
It felt weird for about an hour, then I just adjusted and it felt normal again. I was happy. From that point, I haven't worn the mask indoors anymore
Believe it or not, the planning of my upcoming trip actually also helped me feel excited, when I previously had none. In the end, follow your feelings and the time will eventually come where you will wanna plan your next magical vacation =]