How do you get over someone, you never had something with?

Hey people who are reading this. I really want someone to love me, I slowly seem to get more sad when I don't have someone. There is this girl, she is like my clone. She is so gorgeous inside and outside, and I am sure she knows. She also knows I love her, but due to history of exes and friends "I am not her type". She has said she would do something with me if it wasn't like that. She flirts with me, she teases me, she goes for fake kisses & she touches me everywhere. But she still says, that I am not here type. I don't get it. She always says I am one of the only 2 people where she can be herself. How do I get over this girl? I have so much feelings for her, and it has to stop. Cause why should I have feelings for someone, when I know it only fucks me up? It makes me feel exhausted. Thank you for reading this post/rant/ask for help