I recently read a book about boundary-setting with family, friends, and at work. I was surprised to see a chapter toward the end about setting boundaries with yourself around social media, but it makes sense. The book is called Set Boundaries, Find Peace — maybe that book/chapter will help you, LW.
I can’t tell if you and this woman are connected on social media or if you’re just orbiting her. If it’s the latter, you can block her and she won’t live rent-free in your head between the times you have to interact with her IRL.
Either way, remember that the grass is always greener where you water it.