Annoying 'Friends'

So there is this girl who graduated last year.  She has no friends, and no one likes her because she's very creepy.  She makes moments awkward and is just.. there.  You'll be at lunch with a group of friends, and she'll sit down at your table, and just tilt her head down and eat and try to talk. She's not 'emo' or 'goth' or whatever, she wears preppy clothes just the way she act's is really really creepy. When i was a freshman, this girl, before i knew her, asked me or my number. I thought, sweet, an upperclassman is asking for my number, so i gave it to her.  If ever there was a reason to travel into the past... Anyways, she would call me and text me and stuff, and i was always 'busy'.  So our classes changed, and we stopped talkin and texting and stuff.  Flash-forward to the beginning of summer. She starts texting me again. And has done so till this day. Thats why im actually writing this blog. This girl just sent me a text.. and i agreed to go hang out with her... why do i do this to myself? Why do i feel bad for her? why did i say yes? why why why...?  We have plans to go get ice-cream tonight and i really don't wanna be seen in public with her. I have no idea what to do. I don't know why i decided to make plans with a psychopath. Whens the last time you did something for the first time?  Today, 9/30/2011 at 3:17ish, I made plans for the first time with a psychopath. Wish me luck... Email me your firsts at adarnold1828@gmail.com