So... yeah, there's this girl that I often meet up in places like bookstores, computer shops, mall, and sometimes in some parks... The two of us doesn't each other, but there was one time that, she was attacked by some group of guys or a gang should I say (3 people)... so I rescued her, of course at first, I was at the advantage because they were drunk and all... but the thing here is, the leader of the gang was her bf, and then she shouted that I am a stalker of hers... Then the next thing that happened many guys came, glad I have my collection of pinpoint-ballpen in my pocket so I survived, and run away.
Probably an idiot, because it doesn't sound like she was being "attacked".
Next you see her, let her know that it could be the other way around because A) SHE keeps being everywhere YOU are , and B) Even if it's not true, just say she's not even your type, so she shouldn't go as far to say your her damn "stalker", and to take that ego of her's and shove it up her ass.
Also, after you say this, immediately walk away. And if she follows after you talking shit, throw over your shoulder "Stop stalking me you creepy bitch."
It's a tough thing to do, but after this, she'll realize her mistake.