How do i deal with nasty neighbour?

I have a really nasty neighbour, she feels like she owns the whole street. Everytime i walk to my house, she slams the door really loudly, really dramatically. If she sees me she will purposefully cross the street, or just start acting really silly and immature. It's been like that between us for years, to this day i don't know what my family did to her, i will never know. Anyway it's only started to get to me because i've been quite lonely for a while. This woman is trying to get another neighbour who like me has a disability thrown out of her house. It's pathetic. Her son used to have a thing for me, in fact he's always had a thing for me. But when his mum started acting as she does, he began to follow suit miserably, and is now trying to befriend my family again so he can get close to me. Never gonna happen. I've noticed sadly the better i look, the more loudly i get the door slammed on me. How do i ignore this woman's just nasty behaviour. I feel like she's trying to prove a point as before i continued to be polite to her family despite her rational, and they were polite too. Eventually. I have been described as a good looking girl, stunning, attractive, the better i look the louder i get the door slammed like she gets a real kick out of it.Our family are intellectuals, sports stars, and we have a political and media background. How do i deal with this nasty piece of work, and just get over it? I'm sensitive because i'm having the hardest time of my life this year, how do i not care about this moron.