Why do weird people wanna be my friend?

I dont set out to attract weird people. I think they set out to attract me. I was raised to be nice to people, but theres a big difference between being nice and being interested. Just because i say hello when you walk past me in the street doesn't mean i fancy you. I have a boyfriend who i actually fancy so yes, i do mind if you just call around one night. I think its time to get tough on people who just wont take 'no' for an answer.