Like a girl but it's not mutual. Should i end friendship?

Let me get this right...You wanna end this friendship with this girl because she doesn't have the same feelings for you romantically as you have for her? Here's my advice on this one are you kidding me? that's the stupidest reason I've ever heard as why to end a friendship with someone. If it bothers you that she flirts with you and doesn't feel the same way tell her to stop it as it is making you feel very awkward. If she's made it clear that nothing will happen there's your answer right there. You like having her as a friend good keep her as a friend and if something later on happens then it will, and if it doesn't at least you have a good friend.