Here's an idea:

If you are invited to a wedding that you don't feel good about for whatever reason,

let's say you don't agree with it,

my most sincere tip is to

stay home.

Don't show up with a scowl on your face,

assuming that it is better to be present at the celebration,

all while demonstrating your unhappiness,

your disapproval,

your outright animosity.

It is not.

It is better - for all concerned -

but especially the happy couple,

if you stay home.

For no newlyweds should ever have to suffer through

the cold shoulder

during one of the happiest days of their lives.

There is no amount of your disapproval that should ever diminish their joy.

There is no amount of your disapproval that will keep them from marrying each other.

There is no amount of your disapproval welcome at a wedding.

This is a tip - a quietly fierce tip - about wedding attendance from a woman who has seen quite a few.

PS. If you received an invite and must decline, please remember to send a gift.