There's this girl that keeps stalking me ..

She had been doing this since 2014, she always finds ways to contact me, she's a good person but I can't see myself with her and I told her this so many times (we never had a relationship or been intimate) .. yet she still doesn't understand .. I decided to befriend her and just talk to her from time to time just like a random friend .. she once asked me about my address, gave her a wrong one of course, then 2 days ago I blocked her .. but yesterday she drove around and made it to my apartment, she said she kept searching in the area till she saw my car in a parking lot (my car is kinda unique) and she rang the bell .. told her I was busy and I'll talk to her later .. what can someone do with someone like that though?