<human>: Ok, so there's this girl at work. She's 17 and has a shiton of issues. She told us (without us asking) that she used to cut herself, she suffered from depression and a million other things. 

The problem is that for the past two weeks she has been getting too touchy feely with me and I don't like it. As a matter of fact, I don't like her and she annoys the ever living crap out of me for a number of reasons that I won't say here. 

Now, I don't wanna be rude. I was planning on chewing her up but a friend of mine told me to just try to let it slide a little since she has issues. I get that she has issues but just today at a meeting, in front of our senior supervisor this girl just lays her head on my shoulders when I have never given her even the slightest bit of hint that I would be interested in being friends with her. 

I am friendly with everyone, except for her. How do I get her to back off in a polite way? I don't like drama and I don't wanna cause any drama at work so I'm just looking for a way out here.

Condense the text into a few key points
<bot>: Annoying 17yr old female at work keeps getting touchy feely with me. I don't like it. How do I get her to fuck off in a polite way?