Man of the Stacks

Let me know if this sounds familiar:

There are a ton of people on one side telling you to do (or not do) something and exactly one person on the other side telling you to do the opposite. Now the nature of the thing itself doesn’t matter, it could be as simple and irrelevant as whether or not to wear a blue shirt to work, but that single person has way more pull with you than everyone else on the other side, no matter how many there are.

I have recently met someone like that and don’t know what to do.