Why do I always ignore my intuition?

I have an annoying neighbor, I've actually been posting about her for a while now. I just don't like her, she's very intrusive. I tried Everything from ignoring her when she comes over unannounced but she just won't go away. She's like that Jim Carrey character from the cable guy! Anyway she gives me bad vibes and I don't like her! I also don't have the heart to be bluntly rude and tell her to piss off. Basically I gave her hints that I'm not into her friendship but she's probably stupid or has no dignity. If she had a shred of dignity she would get the point. She has other friends but I'm sure they are equally annoyed by her. So we have a mutual friend should I ask the mutual friend to tell her that I don't want her friendship or should I tell her myself?