Have you ever been with someone who's ex is obsessed with them so much they try to be like you?

I dated this dude who had a little boy and the little boys mother was so obsessed with me. I mean she would have her friends add me, she made fake pages to add me. She messaged me and she started wearing her hair like mines (three different style s I thought I was bugging). She started dressing like me, dressing her son how I dress my son it was so weird and obvious her own baby father pulled her card on it. He was whack too though which is why we broke up but I was just thinking about it. Figured I cannot be the only one that experienced some crap like this.