Bully problem, i need help?

Greetings to you reader! I am being bullied by a grown man. I'm still 18 years old and i can't find enough courage to stand up to him.

Here is a brief description regarding my situation. My front door neighbor is clearly jealous of my family. We have a better house than theirs, a better car, my father has a Job with handsome pay, and he is married to my beautiful mother, which by the way his wife is very intimidated by and the list goes on. While he on the other hand does not have a job, and his wife works for his whole family. Just to be clear, my family never did anything wrong to them. We have been kind to our community and a lot of people can vouch for that. We just mind our own business.

So, what does the man do to treat his insecurity? He throws rocks at my dogs whenever they bark at him. He mocks how my parents talk and sometimes talks to himself as if he is trying to say something to me. He revs his bike every morning and at night before he finally parks it. He copies how we decorate our lawn. We have three dogs and the next day they bought 3 dogs as well, coincidence? Not really ! Lastly, he has this creepy stare that i just can't stand.

I did try to stand up to him once, i talked to him in a civilized manner just how my father taught me about him throwing rocks at my dogs. But, the man denied it but clearly i saw it with my own eyes. After confronting him though, the bullying stopped for a while but slowly started again.