What happens when you have a stalker ex-girlfriend?

I know that I have been talking about my ex for a few months now but ever since I decided to just let things go and stop talking to her all together she has either been stalking my pages Or would simply use somebody else's just so she can keep tabs on me. She would even like the stuff that I post almost if she is waiting for me to say something to her. Seriously it's a pain in the ass.

Become the submissive slave u once were!? o.0 Jk.. tbh it would be hella annoying, and i might confront her and explain her that she is being annoying in a nice way.

Have the number of your lawyer and the cops in hand Just in case

Be blunt and straight forward and tell her you're done with her. Also.. tell these others what having an "IRL yandere" is like.