Depending on what you want this person to think of you, there are different uses for oils that you can try. If you know of a plant that is stated as being able to help with whatever you're try to achieve, you could purchase the oil and wear it like a perfume - that way when they smell it on you they'll start to unconsciously feel that way. Also, simple tricks like acting in a certain way that causes people to think a certain way of you could be very helpful.
The Chinese luck cat Maneki Neko (or however it's spelled nowadays) is said to be able to help with keeping away stalkers. Keep one facing the main entrance of your home (or all of them) so that it can watch your home for you and keep them away.
It's also thought that burning ginger or cayenne pepper with the name or an image of the stalker can help keep them away (by causing them to feel as if they're on fire when they think of you - though I don't think they mean literally when they say that).
I hope you can easily clear your problem with this stalker.
The police are just as bad if not worse than stalkers... I would trust a shotgun a lot more... And if you absolutely need something magical... I've used sound to make common pests disorientated and dizzy. you could with some experimentation broadcast something similar around your property.