Write down a short list of the people whose opinions matter to you.

Now rewrite that list from most important to least important. You may even want categories, because some people’s opinions matter on certain subjects and not on others.

Once you have that list, treat it as definitive. Everyone who is not on it no longer gets a vote.

Behave accordingly. Allocate your attention, effort, and concern only to those people.

The opinions of everyone else are irrelevant, because functionally, they are.