Friendzone her at once, or lie and say you're interested in another girl. Just say you fancy someone else then she should get the hint and stop flirting with you. She could be a socially awkward person who is just trying to be your friend but she is coming across as flirty to you. You need to just be straight with her, and ice weapons are always best.
Pretty much this.
"All you lords and ladies, still think that the only thing that matters is gold.
Well this (torturing people) makes me happier than all your gold ever could!
And that makes me happier than all her sapphires,
so go buy yourself a golden hand, and FUCK yourself with it!"