"People that matter dont mind, and people that mind dont matter."

Dont know who said it, but anxiety doesnt really play by logical rules, afaik.

Literally - people dont spend much time thinking of others past surface thought. Unless they like you or dont like you; but not only will most people not reach that level of involvement; it still follows the above rule. If they are giving positive attention then theyre worth paying some attention to (generally), and if its negative attention then they dont matter. They arent contributing past some potential self reflection and you make that call. But it IS a call you get to make.

Someone thinking badly of you somewhere has no bearing on anyone's reality.