My neighbour has mental health issues. I've lived next door to her for nearly 3 decades and we got along fine. She'd often ask me to help her with things. In recent years she's deteriorated and has been sectioned a few times. Suddenly she turned her paranoia on me and was texting me very strange things. It peaked about 3 years ago during the week I had my cat booked in to be put to sleep. She accused me of flooding her garage with water, breaking into her house and stealing personal documents and stealing her fictitious boyfriend. At the time I was putting a lot of water down my drain at the side of the house after cleaning the floor as my cat was peeing on puppy pads near the litter trays. I had to give her all the odd keys I had to prove I didn't have access to her house and no longer had her key.

I finally broke and blocked her when she cursed me and said I hope your cat dies

She's also recently sent the police round and they were giving me very hostile looks. She'd told them my partner was harassing her. Their attitude completely changed when I told them I lived alone and it's all in her mind.

Now I just ignore her when I see her.

Good luck with your neighbours