My partner and I went through this last year with a family members wedding. We were just honest/open about it, it caused some tension, more with my parents than than anyone else, but after a few months everything kinda calmed and was the same as before the wedding. I will say even though we knew deep down we weren't going to make it (the wedding was smack in the middle of where we got back-to-school surges previously and a new variant was spreading fast), we wanted to go so bad that we waited longer than we should have to let them know in hopes something would get better/change. Don't recommend, just getting it over with ASAP if this is already how you're feeling.

Also, , this shit sucks.