<human>: So there's this girl in my class who keeps trying to get me to ask her out, she's been doing it since freshman year. I don't really like her as a person and I don't find her attractive either. However I put up with her because I don't want to be mean, so she just ends up awkwardly sitting next to me in class trying to make conversation.    
So yesterday she gives me some valentine bullshit, and also she is apparently facebook messaging my friends trying to get my number.    
My friends tell me I just have to be a dick to her, but I don't think I can do that.    
How can I get her to leave me alone? I really just don't like her and the fact that she's doing this makes me very uncomfortable. (She has some history at our school to put it that way.)    
Please help. I am clueless with this kind of thing.

Could you distill the essence of the text into 1-3 sentences?
<bot>: Girl wants to be in relationship with me, I don't (strongly) and I don't know how to get her to (preferably) never speak to me ever again without being a dick.