Stay strong. There are crazies out there. Your true friends will believe you.

Sounds like you have let it get too far with her! time for a restraining order against that person.

Block all information flow to the ex and don't mention her until you're getting serious. Stop calling her the 'crazy ex'. 'my last partner turned out to have some pretty scary mental health issues' stops it being a meme and shows the truth. If you know where ex is getting her information from, cut them out of they're a person or lock down your privacy if it's from socials. When you can afford it, move and keep your address private to only people you trust. Google how to check your phone for tracking software and the things you regularly wear/take with you for actual trackers. She can only interfere if she knows where you are and what you're doing and you control what she can find out. If it's just the fact that you have 'a crazy ex' running the dates off then just stop using those particular words. Use 'abusive', 'mentally unwell' and 'jealously controlling' instead. I'd also point out that it's just the one. Not every single woman you've been with, just her. You should probably run yourself in for a mental health check while you're at it. People like that can do serious damage that you don't want to be dragging with you through your future relationships.